Dominique

This is a psychological horror film about an American businessman who devises a plan to compel his rich English wife to commit suicide by manipulating her into believing she's losing her mind, allowing him to inherit her family's estate and assets. His scheme seemingly works, but he soon finds himself being haunted by what he believes is the vengeful ghost of his wife. The film's twist ending reveals that the "ghost" was actually his half-sister who had enlisted the help of a man she loved to fake Dominique's death and claim David's share of the fortune.