在这部食人海滩恐怖片中,主人公汤亚、罗德尼和鲁伯特一起去参加一个在海滩举行的音乐派对。这个音乐派对将持续整个周末，派对上的人们情绪都很高昂，却没有注意到危险正在临近。已经有几个小镇居民被海底怪物所吞噬，然而参加派对的人们并没有对此给予足够的重视，甚至无视当地女孩泰西的警告，结果越来越多的人成了怪物的盘中餐……
Something ancient lurks in the surf off Sea Bright Beach. It swims silently, can breathe air and walks upright. It's also very, very hungry and not for seafood anymore. Tonya, Rodney and Rupert are out-of-towners joining a crowd of young people gathered on the beach for an all-weekend music marathon. Even after several townspeople are torn apart and devoured by the humanoid creatures, the partygoers remain oblivious to the horror that has risen up from the sea. They dismiss local girl Tess as a weirdo and refuse to heed her cries and warnings that monsters roam the beach, hunting for human flesh and that hundreds of buried egg sacks are ready to hatch at any moment.
