When seasoned fishermen Mick, Dan and Travis Thompson discover the wreck of the luxury yacht Seraphine, they think they've stumbled upon a mystery, and maybe a rescue. But as the survivors cling to life aboard the Thompsons' modest trawler, the Dogtooth, something stirs beneath the waves.A monstrous great white, ancient, relentless, and hungry, begins to circle. Now, miles from shore and running out of time, two families must battle the sea, the elements, and the most fearsome predator ever to live. The ocean has one rule: only the strong survive.