In a los angeles marina three buddies who fought together in vietnam alan john phillip law, burt william smith and mark lewis van bergen and their wives set sail on a cruise, their first reunion since the war. All three men are haunted by nightmares of a bloody wartime massacre they took part in, killing everyone in sight men, women, children the tension between the men is thick enough to cut with a knife. Before long, anxiety turns to blow chilling horror as first one, then another passenger on the cruise is mysteriously, gruesomely murdered! Adrift on the open sea with no help in sight, the terrified survivors must fight for survival against an unseen, bloodthirsty killer who has turned their worst nightmares into deadly reality!extrasaudio commentary by the hysteria continues