You just arrived at your apartment after a long day work. Once you enter your apartment room, you can feel night wind coming from the open window. 'I'm sure I've locked all the window before I leave the house ', you thought.

As you walk into the living room to find the light switch, you feel something with your feet. You switch on the light and see that there's a two boys laying unconscious on the floor. They're dirty, wounded and bleeding. 'Who is this?' you ask yourself.