At the end of June in Paris: Mireille accompanies his friend Thomas, a solitary and restless being, during a walk to Père Lachaise. Thomas is very agitated, worried. He confides to Mireille that he wishes to be cremated in the event of death. In September: after a period of holidays, Mireille returns at her home. She and his friends do not any more manage to contact Thomas. After investigation, Mireille learns that Thomas died in August, only. As he has no family his body was interred in the square of the needy of the new cemetery of Thiais. Mireille wants to honor the last wills of his friend, but the law is strict: to dig up the body and cremate it, the services of the city hall have to have the signature of a member of Thomas's family. Mireille learns that Thomas had a younger brother, Melchior. But But the young man, marginalized, abandoned for years by his older brother, refuses to sign the licence to dig up.

A young farmer of 31 years, Sagat, heads to a cemetery in the middle of the night. The next morning, Roman, a 29-year-old guy, is found sitting in Sagat's living room. It seems he has never been in that place before. Yet, something suggests otherwise. Who is he? What ties them together? Why is he there, and for how long?