At a Catholic boarding school in France, two teenage girls share a dark bond.
They pledge to serve Satan, fueling their friendship with a sinister promise.
During summer vacation, they engage in cruel pranks against staff and neighbors.
Their games escalate dangerously, culminating in a tragic accident.
A driver runs out of gas on the road, and their actions lead to his death.
When they return to school, they find themselves under police scrutiny.
The thrill of their twisted friendship quickly turns into a nightmare.
What started as innocent fun reveals the dark side of youth and rebellion.
