Hazel Court (Masque of the Red Death, The Raven) and Dermot Walsh (Make Mine a Million, The Straw Man) star as a young couple who decide to buy a luxury steamboat for a romantic getaway. They think that they've found the perfect boat, and scoff at warnings that it's haunted.

Despite their initial incredulity they are gradually convinced that there is something strange going on in their new love-nest and bring in a paranormal expert, Professor Mansel Martineau (John Robinson) to investigate, who uncovers a horrifying secret about the boat's previous owners...