Seeking adventure during a school field trip, fifteen kids stumble upon a strange man in a cave, who invites them to play a game. But it turns out, the game is all too real.
It's a contract for 
the chosen heroes.
.إنه عقد خاص بالأبطال المختارين
für den Vertrag,
der euch zu den Auserwählten macht.
pour signer le pacte de héros élu.