La Nuit de la mort

The name of this movie is La Nuit de la mort released in 1980-10-22 and it's main theme is When she takes up her new post at an eerie convalescent home deep in the French countryside, nurse Martine Isabelle Goguey soon discovers that several missing co-workers may have fallen prey to an unspeakable evil rumored to roam the hallways at night. But as Martine looks deeper into the mystery, she suspects the home's aged residents know more about the menace than they let on..