While the credits claim that Sergio Grieco's THE SINFUL NUNS OF ST. VALENTINE was loosely based on a play by Victor Hugo, the more obvious inspiration for this delirious piece of nunsploitation was Ken Russell's The Devils (1971).

Pursued by soldiers, having been accused of heresy, Esteban (Paolo Malco) seeks refuge in a nearby convent--the same convent to which his girlfriend Lucita (Jenny Tamburi) has been banished by her parents. In order to be reunited, Lucita must resist seduction by her lesbian cellmate (Bruna Beani), endure the deranged torments of the Inquisition, and escape from a madehouse within the convent walls. Esteban, meanwhile, contends with the advances of a sensual abbess (Francoise Prevost).

By turns erotic, horrific, and shamelessly melodramatic, THE SINFUL NUNS OF ST. VALENTINE has well earned its reputation as a notorious nunsploitation classic.