In the mid-18th century, the Beast is hunted around the Château de Saint-Alban. In the mid-20th century, a new kind of psychiatry is invented there. Theatre and madness span the centuries.

Arrived in an abandoned place or emerged from a society at a standstill, men and women organize themselves in their own way, borrowing what they find on the spot and in the memory of what surrounds them, the theater and the people... In the superb mineral setting of the Boulbon quarry, Philippe Quesne, inspired by a work by the painter Jérôme Bosch, orchestrates a joyful retro-futurist epic to meet the worlds to come, between environmental science fiction and contemporary western.