Maléfique

Maléfique is a 2002 French horror film directed by Éric Valette.

Carrere, a middle-class family man convicted of financial fraud, arrives in prison where he finds himself sharing a cell with three others- Lassalle, an old librarian who murdered his wife; Paquerette, a childlike lunatic who ate his infant sister and Marcus, a beefy young man (whose crime is not mentioned) who yearns for a sex-change.