The Deep Ones follows the story of a married couple, Alex and Petri, who rent an Airbnb at the beach to celebrate their anniversary. However, their romantic getaway is quickly interrupted by their peculiar neighbors and strange occurrences all around them.
As they try to uncover the truth behind the bizarre happenings, they discover that they are in the grips of a mysterious cult and their ancient sea god, Dagon. The cult is led by a charismatic man named Father O'Malley, who convinces a group of people to worship the sea god and perform rituals to appease him.
The couple soon realizes that the cult has plans for them, and they must fight for their survival as they find themselves surrounded by dangerous creatures from the sea. With the help of a local fisherman and his granddaughter, Alex and Petri try to escape the clutches of the cult and the sea god's wrath.
The Deep Ones is a horror film that explores the themes of cults, ancient gods, and sacrifice. The movie examines the danger of blindly following leaders and the consequences of invoking ancient forces that one cannot control.