Chloé, a student specializing in Celtic History, participate in a dig in the forest of Broceliande while a series of murder occurs on the campus. Chloé must soon face the mythical monster behind the string of murder and use her knowledge to make it out of the forest alive ...

September, 1986. Alice and Martin are 17 years old. They come from provinces to Montesquieu high school in the capital. Like many youngs of their age, born in the 70s and nostalgic of a too comfortable childhood, they progress carefully in life. While Alice and Martin are finding their footing, demonstrations against the Devaquet law and the tragic death of Malik Oussekine are happening.