For decades, the town of Trouillensac has been the site of terrifying phenomena.

11-year-old Kori, who’s addicted to screens, has been signed up for a nature weekend of camping in Trouillensac, where she meets Timéo. But instead of enjoying the trip, she plays on her phone and drains the battery. To find another one, the children set out on a nighttime adventure through the forest. Unfortunately for them, it’s home to demons and voracious monsters…