Jimmy Green, a prodigal party boy, is throwing the spring break festival of a lifetime on the island of White Sands. Little do the hundreds of teenage party-goers know, an underwater earthquake has cracked open a crater beneath the ocean s surface. This demolition unleashes the most menacing beasts to ever rule the waters, and the only predator to ever swim through sand. It mercilessly feeds on anything that crosses its path, and it is up to those left on the island to stop the carnage.