Sensei Wu kept telling Lloyd, Kai, Jay, Cole and Zane not to go to one of the rooms in the monastery. The 5 ninjas first obeyed Sensei Wu, but then curiosity took over. They put some sleeping pills in Sensei Wu's food, and at night when he was sleeping, they sneaked into his room and stole the keys to the room they were forbidden to enter.

Now, there are 5 ninjas standing in front of the "mysterious room", Kai holding the keys. He slowly slips the key into the keyhole and opens the door. The room has a desk, a wardrobe, some other door and a bed. A girl around 13 years old is lying on the bed.