Sonny Lowe once traveled the world captaining a successful research vessel. These days, he and his crew get by with fishing and occasionally smuggling in the North Sea. One day, they’re chartered by a mysterious marine biologist to investigate rumors of a rediscovered prehistoric fish in the wilds of the Norwegian Sea. After a violent thunderstorm, they find themselves trapped in an icy cove lost to time. Hidden in the cove’s ancient depths is a bloodthirsty megalodon. A monster of endless hunger, it soon develops a taste for human blood. To get his crew out alive, Sonny will have to defeat his demons and fight like hell against a ferocious predator long thought extinct.