Driving by their deep will of hunting the Mayan treasure, a group of divers, who go in a hunt on the deep water, where their life turns upside down, when they face the horrible attack of a sea creatures that wreaks havoc in the sea.
At the end of the day, Poseidon Rex is not a good film. Its cheapness and corny clichés are too powerful to ignore. But Poseidon Rex is a sincere film, and that can go a long, long way.