Mythic creatures emerge from the sea to feast on the residents of a fishing village.

The fishing vessel Solita crosses a storm during the night and the Skipper Will McKenna witnesses a weird creature attacking the crewman Joey. They return to the dock and Will has difficulties to pay the amount he owes to the former owner of the boat, Roy. The fish population is reducing in the area and the biologist Arden is investigating the possible causes. Meanwhile, Will's daughter Carly steals the keys of her father's cottage in a nearby island and plans to travel with her boyfriend Danny and their friends Erin and Drew to spend the weekend in the island. However, Drew is murdered by a deep sea predator on the dock and his pieces are found by Will and Arden. Carly, Danny and Erin do not have any news from their friend and travel to the island without Drew. Sooner Erin is murdered by the creature and Danny is bitten by a newborn reptile. Danny and Erin seek shelter in the cabin but they are trapped there by the creatures. In the continent, Will and Arden learn that the deep sea predator is a very dangerous species, after a series of lethal attacks, and they head to the island to rescue Carly.—Claudio Carvalho, Rio de Janeiro, Brazil

From the darkest depths of the ocean, a long-forgotten amphibious predator emerges, to wreak havoc on the small fishing community of Cedar Bay. As Captain Will McKenna, and the marine biologist, Arden James, try to get to the bottom of the mystery of the depleting fish population, a violent storm threatens to cut off the area from the outside world, just before an epic battle between man and monster begins. But, the aquatic invaders have already tasted the warm human flesh, and they start to take a liking to this new source of protein. One by one, the helpless inhabitants fall prey to the voracious sea beasts. Who can stand in the way of the hungry swarm of primaeval troglodytes?—Nick Riganas