This is set place after the Titan war, and before the world knows about Ben 10. Percy and Ben are both 16
Percy POV
"Where is Ben Tennyson?" The big octopus like thing roared.
"I told you, I don't know who he is!" I slashed my sword at him. He took out a gun thing and shot it right at me, but it wasn't a gun. It electrocuted me, but it wasn't as bad as one of Thalia's lightning attacks. I got up and pointed my sword at it. Annabeth ran to my side, though I had told her to stay away, out of sight. It was about to shoot again when I heard a yell from the forest.
"Vilgax! I thought I killed you!" A familiar boy in a green jacket turned the dial
on his watch and slammed his hand on it. He turned into a green viney thing and yelled
"Swampfire!" He turned to the octopus, Vilgax, and shot fire out of his hands.
Vilgax turned and shot into the air.
"I'll get you Ben Tennyson!" I looked back down at the thing that the boy turned
into. He touched the hourglass symbol on his chest and turned back into the boy. He
walked over to me and Annabeth, followed by a girl with red hair and a tall boy.
"Hi, my name is Ben Tennyson, and this is Gwen and Kevin." He put out his hand for me to shake.
"I'm Percy. This is Annabeth. I think I've met you before…" I flashed back to 6 years ago, when I was 10, before I knew I was a demigod. My mom and I had gone to this town called Bellwood, to visit my mom's friend. She had left me home alone for whatever reason, I didn't remember. I wandered off to an R.V. that was parked 2 blocks away from the house. A boy in a white and black t-shirt walked out of it and threatened me, calling me an alien. When he learned that I was just a human (or so I thought), he told me about the watch on his wrist. Over the week, we became best friends, but I had to go back to New York.
"Oh my gosh, Percy Jackson? I remember you from 6 years ago!" Gwen said. But before anyone could respond, they were all knocked out.
So, what do you think?