A young American woman comes to visit her sister studying in Paris. She has a company that has fun in the underground catacombs, and the DJ of the party is her good friend. The young newcomer must undergo a kind of initiation in order to be accepted by her sister's team. However, there is a problem. A kind of Kaspar Hauser is supposedly hiding in the catacombs, a man who was born and raised in the darkest rituals, and now a renegade haunting those who got lost in the labyrinth of the catacombs.
—Televizija Zagreb