A boating accident off the coast of Spain sends Paul and his girlfriend Barbara to the decrepit fishing village of Imboca. As night falls, people start to disappear and things not quite human start to appear. Paul is pursued by the entire town. Running for his life, he uncovers Imboca's secret..they worship Dagon, a monstrous god of the sea...and Dagon's unholy offspring are on the loose...

A college student renting an old room in a boarding house discovers a plot by sinister, otherworldly forces to sacrifice his neighbor's infant.

Charlie's getting married. When he invites his friends to join him for a stag weekend in a remote British cabin, the group thinks it's a great opportunity to leave the U.S. behind and have a blow out with their old buddy - only thing is, Charlie isn't telling his friends the whole truth about the trip. Instead of celebrating, events soon take a sinister turn when the friends start to disappear one by one.