A couple tow a boat into port but the two crew members disappear without trace. An American appears and wants to buy the boat, but cannot until the mystery is solved, so the three of them start to investigate what happened to the boat and the crew. This is a well contructed British mystery/thriller with a few good plot twists and a cast better known for their television roles.
3/5 
William Lundigan
Naomi Chance
Vincent Ball
Jean Lodge