You come across a little girl crying at night, with no sign of her parents. You offer to help and she tells you that she lives with her brother but lost her way. She gives you the address and you guide her home.

A boy your age answers the door, wearing sweatpants and a tank top but you can't see his face. He immediately lets out a cry of relief at the sight of his sister and they hug.

"Oh thank-" He starts but stops when he looks up at you. It's your enemy.