The story is set in a remote castle in thirteenth century France and revolves around the dark passions aroused by Blanche, the beautiful young wife of the Baron who owns the castle. When a young Knight comes to stay with them, the guest overstays his welcome and begins a doomed affair with Blanche.

Animated French film written and directed by Walerian Borowczyk. The story follows the lives of Mr Kabal (voice of Pierre Collet) and his mechanical monster wife (Louisette Rousseau) who get on each other's nerves but can't imagine being apart. When Mrs Kabal suffers from indigestion after eating a butterfly her husband has to travel inside her to find the source of the problem. The film was Borowczyk's first full-length feature.