The title of the film comes from "dinosaurs". The billion-year-old glaciers in Alaska contain shark fry from 150 million years ago. Under the influence of climate change, the glaciers freeze, and the ancient creatures reappear in the oceans of the 21st century. They swim to the harbor of Vallarta, a quiet and warm port... The hungry prehistoric shark opens its bloody mouth to the people there, leaving blood everywhere. When will the killing end? Who can get rid of this beast? !