NOTE: Before you start reading this, I want you to know something. The game plot of Portal 2 is included in this story. If you haven't completed the game yet, I highly suggest that you DO NOT read this story, because this will spoil the game. VERY MUCH. So uh...spoiler alert. Don't blame me if you find out what happens without playing the game. YOU HAVE BEEN WARNED. Thanks for reading!
After GLaDOS created the two robots, Atlas and P-Body, she had feared that another being will kill her, or take over the Aperture facility, like Wheatley. She felt like she needed the two robots to be safe. She called on the speaker, "Atlas and P-Body, please stop your testing, and see me immediately, a lift will reach you shortly after you finish this test chamber."
The two robots were wondering why GLaDOS told them to stop testing.
"Hey, P," said Atlas, "you think something is wrong with GLaDOS?"
"I think so," P-Body shrugged, "she never tells anyone to stop testing..."
The two got more confused, but decided to finish their test chamber first before thinking more. As soon as they finished their test, a lift hovered down towards the two robots. They both entered the lift and it ascended quickly to GLaDOS's chamber.
The two exited the lift and bowed.
"What's wrong, Miss?" P-Body asked.
"Is that human coming back?" Atlas wondered.
"No, no..." GLaDOS said softly. A panel below the two rose towards her face. "I think that idiot core is coming back..."
Atlas and P-Body were stunned.
"B-But Miss!" Atlas exclaimed, "Wheatley was in SPACE for six years! How can he possibly come back to Aperture??"
GLaDOS softly answered back, "He has that core with him, I have a feeling that he is trying to make a portal out of it. And once he does, he will be back in the emergency testing chambers, as if nothing ever happened."
P-Body thought that was nonsense. "Miss, that is impossible. Remember that human? She made a portal to the moon, and everything was sucked into space. That imbecile, Wheatley, must be millions of light years away from earth!"
GLaDOS knew about that incident years ago. "I know, but once he returns, he will seek revenge on me and take over the facility once again. I'm afraid I am going to have to relieve you from your testing, and flee before he captures you two." A glass box came down on the two robots, both startling them.
"But Miss!" Atlas yelled, "What about you? And us?"
"You will be able to use your portal guns in earth. Find and live in a shelter for a few years and come back. I will try and prevent that idiot to take over. This glass box will take you to an unknown place in the earth. Please hurry. And goodbye." The glass box disappeared from the room.
GLaDOS called for turrets to surround the facility so Wheatley couldn't reach her. She gave a little chuckle. "Good luck reaching me, Wheatley!"
A few hours later, in an abandoned test chamber, a huge blue circle appeared and Wheatley popped out, screaming, until he hit a wall. He slowly groaned and opened his eye. "Where am I..." He said exhaustingly. He looked around where he was and came across a sign that said, "APERTURE LABORATORIES". Wheatley broke out a little sinister laugh. "After six horrible years, " he said loudly, "I am finally back! And I will have my revenge! But first, to get the two robots!"
Atlas, P-Body, GLaDOS, PotaDOS, Wheatley, turrets, the Portal Gun, and Portal 2 subject to Valve.
Plots of Story and the Story itself subject to me.