Missing

Suggestions:

Super-Horror Experience 5: Four Priestess Hell Super-Horror Experience 3: Zombie Voices Super-Horror Experience 1: Death and Make-up Super-Horror Experience 2: Vampire Spirit Faces of Dying IV

A man with plans to propose to his girlfriend hides an engagement ring in the ancient underwater ruins off Japan's Yonaguni Island. When he goes missing she must investigate and remember what happened.