I'm not sure if this story was true because the war on at the time ended not long after, and there was mention of bodies never recovered in the wreck of the boat, but personally, who cares. This is a very interesting and near creepy story of one man's survival on a boat, and then somehow, the same events happen again on what seems to be the same boat. Sir David Jason as Jack Hardy is the man who survived a terrible storm on a large boat/ submarine. Unfortunately, the events that previously happened to him happen again, and the members of the new boat he is on seem to "sink" into the spell of past history. Jack is now trying everyone he can to stop the events that happened to him and the boat 40 years ago. Good!