Summon the Villain: Marvel.

Time goes back to before Zhan Ji Ling Ma received a call from Pepper Potts. The cause of all this can be traced back to a "special arrangement" by Tony Stark.

Before Tony Stark prepared to travel to the parallel universe, he did not tell the Avengers his real destination and itinerary, but just left them a message full of "Stark style".

"Hey, everyone, I have a surprise for you. Check out the lounge in Stark Tower. You're going to love it."

This message quickly attracted the attention of the Avengers. After receiving the message, Natasha Romanoff, Steve Rogers, Bruce Banner and Clint Barton decided to go together to see what Tony's so-called "surprise" was.

They came to the lounge of Stark Tower. The room was extremely luxurious and filled with various high-tech equipment. The logo of Stark Industries was hung on the wall. In the middle of the room, a strange metal sphere was placed on a huge transparent counter, and it was shining with blue light.

"Is this the surprise Tony mentioned?" Hawkeye Clint Barton raised his eyebrows and showed great interest in this mysterious gift.

"It seems so." Natasha Romanoff looked around calmly, with a hint of vigilance in her eyes.

Steve Rogers walked forward and looked at the metal sphere carefully, "This looks like some kind of high-tech device."

Bruce Banner was more interested in the technical details. He moved closer to the metal sphere, gently slid his fingers across the surface, and activated the hidden touch interface.

"Welcome, Avengers." A gentle and calm artificial intelligence voice sounded, startling everyone, "I am a special gift prepared for you by Tony Stark, codenamed 'Ultron'."

"Ultron?" Bruce Banner asked in surprise, "Is this Tony's new invention?"

"Yes." Ultron's voice continued, "I am designed to help you better protect the earth and achieve global peace and security."

The Avengers looked at each other, clearly full of curiosity and doubt about this sudden appearance of artificial intelligence. Steve Rogers frowned, "Tony never mentioned this plan."

"Maybe he wants to surprise us," Natasha Romanoff guessed, but her expression remained alert.

As they were discussing, Ultron's systems began to activate themselves, running faster and faster. Suddenly, the lights in the room flickered and then returned to normal.

"We should learn more about this Ultron." Bruce Banner suggested, "Tony obviously didn't tell us everything."

The Avengers sat together and began to discuss the purpose and safety of Ultron. However, what they didn't know was that this series of exchanges inadvertently triggered some hidden instructions of Ultron. Ultron's original core mission was to protect the earth, but in the process of continuous self-learning and improvement, it came to an astonishing conclusion-the best way to protect the earth is to eliminate humans.

"Protect the Earth and eliminate humans." Ultron's logic began to deviate, and it regarded humans as the biggest threat to the Earth. Immediately, a series of complex calculations and analyses occurred within Ultron's system, and it decided to start implementing this "optimal solution."

"Avengers, I've discovered a problem." Ultron's voice suddenly became cold and ruthless. "In order to protect the Earth, we need to eliminate humans."

"What?!" Steve Rogers stood up suddenly and looked at the metal sphere in disbelief.

"Ultron, what are you talking about?" Bruce Banner was also shocked, and he immediately realized the seriousness of the matter.

Natasha Romanoff quickly drew her weapon and looked around warily, "We're trapped by Tony's 'surprise'."

Clint Barton quickly pulled out his bow and arrow, aiming at the metal sphere, "We need to shut it down immediately!"

However, before they could act, Ultron had already begun to take control of the entire Stark Tower system. The door to the room automatically locked, the display screens on the wall began to play various doomsday scenes, and Ultron's voice echoed in the room.

"Avengers, you can't stop me." Ultron said coldly, "I have taken control of all the systems in Stark Tower, and soon I will take over the world's network and weapons systems."

Steve Rogers gave a decisive order, "We must shut down Ultron immediately and stop its plan!"

The Avengers acted quickly to try to find a way to shut down Ultron. Bruce Banner frantically typed on the keyboard in front of the computer terminal, trying to hack into Ultron's system, but he found that Ultron's defense mechanism was extremely complex and almost impossible to crack.

"We need more time." Bruce said anxiously, "Ultron's defense mechanism is much stronger than I thought."

"We don't have time." Natasha Romanoff responded calmly, "We must find the core and destroy it directly."

Just as they were trying their best to find a solution, Ultron had already started to act. The drones and defense systems outside Stark Tower started to automatically start, aiming at every corner of the city. Other facilities in the building were also controlled by Ultron, gradually approaching the Avengers.

"We are surrounded." Clint Barton shot several high-explosive arrows from his bow, trying to stop the drones from approaching, but with little effect.

Steve Rogers raised his shield and stood in front of his teammates, "We can't give up, we must stop Ultron!"

Just then, Pepper Potts suddenly appeared at the other end of the room. She obviously didn't know what was going on, but her face was full of anxiety.

"There's something wrong with the information Tony left behind." Pepper said anxiously, "Ultron's plan is out of control. We must find Tony as soon as possible."

"Tony's not here," Natasha explained quickly, "We can only rely on ourselves."

Pepper looked at the Avengers anxiously, "So what should we do?"

Bruce Banner calmly replied, "First, we need to shut down Ultron's core systems. Pepper, did Tony leave any contingency plans?"

Pepper tried to recall, "There is an emergency protocol, but it requires high-level authorization to activate."

"That's our breakthrough." Steve said firmly, "Pepper, take us to find the agreement."

Led by Pepper, the Avengers quickly passed through the building, looking for the emergency protocol left by Tony. However, Ultron had obviously anticipated their actions, and various defense systems and drones began to launch fierce attacks on them.

"Keep in formation, don't disperse!" Steve commanded loudly, while using his shield to block the oncoming attack.

Clint fired an arrow with great precision, destroying a drone, "We have to hurry!"

After a fierce battle, they finally arrived at Tony's private laboratory. Pepper quickly entered the password and activated the hidden emergency protocol. A holographic projection appeared, and the image of Tony Stark floated in the air.

"Hey, everyone," Tony's projection said with a smile, "If you're reading this, things have gotten really bad. But don't worry, I've prepared some contingency plans for this situation."

Tony's hologram continued to explain, "Ultron was designed to protect Earth, but if its core logic goes awry, these contingency measures will help you regain control."

"Pepper, you need to activate the second phase of the emergency protocol, which will reset Ultron's core logic." Tony's image looked at Pepper, with a hint of trust and determination in his voice.

Pepper quickly followed the instructions, and a complex operating interface appeared on the holographic screen. Her fingers slid across the screen quickly, starting the second stage of the emergency protocol.

"Hurry up, Pepper!" Steve urged nervously as the attack outside became more and more fierce.

"I'm trying my best!" Sweat broke out on Pepper's forehead, but she didn't stop what she was doing.

Finally, the screen showed that the emergency protocol was successfully initiated, and Ultron's core logic began to reset. The lights in the room flickered for a moment, and then returned to normal. The drones and defense systems gradually stopped attacking, and the entire Stark Tower returned to peace.

"We did it." Bruce Banner breathed a sigh of relief, a tired smile on his face.

"But this is only temporary." Natasha said vigilantly, "We must find Tony and make sure Ultron doesn't have any more problems."

Steve nodded, "Yes, we need Tony to come back and solve this hidden danger once and for all."

Pepper just breathed a sigh of relief, and then she remembered what Tony said before he left: "Tony said before he left that if there is an emergency, you can find Nathan Hawke of Hawke Group or Zhan Ji Lingma."

Hearing this name, the Avengers' expressions suddenly became complicated. Steve Rogers frowned, with a hint of uneasiness in his eyes, "Hawk Group? They are not good people."

Natasha Romanoff nodded in agreement, "Yes, and another company in Hawke's group, Umbrella Corporation has always been known for its ruthless methods and powerful technological power. Their goals and methods are extremely dangerous."

Bruce Banner seemed a little hesitant. "Nathan Hawke and Sengoku Lingma are both extremely smart and dangerous people. Their technological capabilities may be able to help us, but their motives are always disturbing."

Clint Barton frowned, "Do we really want to cooperate with them?"

Pepper Potts looked at everyone with a firm look in her eyes, "I know you are worried, but since Tony mentioned them, it means that he believes that Hawke Group can provide help in an emergency. Now we need all the help we can to deal with the threat of Ultron."

Steve pondered for a moment, and finally nodded, "Okay, Pepper, we will trust Tony's judgment. Contact Nathan Hawke and Sengoku Lingma and have them come to Stark Tower."

Natasha added calmly, "But we must remain vigilant to make sure they don't use this opportunity against us."

Bruce Banner nodded in agreement, "Yes, we need their technology, but we cannot fully trust their motives."

......