Dagon plot
Paul and his gorgeous girlfriend Barbara celebrate their business success with another couple, Howard and Vicki, on their yacht off the coast of Spain. Their party is interrupted when the boat crashes into a rock protruding above the water and Vicki gets her leg wedged between the boat and the rock. Paul and Barbara leave for the coastal fishing village of Imboca to get help. The residents are not really helpful, but someone is willing to go to the crashed yacht with Paul. Howard and Vicki are gone. Upon return, Barbara finds herself captured by the increasingly strange villagers. Paul is then chased himself and slowly but surely discovers the true story of Imboca...