过度执迷工作以致神经衰弱的保罗（Ezra Godden 饰）经常为一个恐怖美人鱼的噩梦所困扰，为缓解压力，他随女友芭芭拉（Raquel Mero?o 饰）以及好友豪尔（Brendan Price 饰）、维琪（Birgit Bofarull 饰）乘游艇来到西班牙度假。　　在海上，他们听到附近印波加小岛传来的神秘歌声，随后一场特大暴风雨袭来，游艇触礁，维琪受伤。保罗和女友乘救生筏前去小岛求救，而留守的豪尔与维琪却遭到不明生物的袭击。保罗他们在岛上见到身体怪异的居民，为营救好友他们被迫分开，而噩梦就此开始……

The movie is based on the suspense short film nominated for the Golden Méliès to the Best European Fantastic Short Film, winner of more than 30 awards and screened by more than 200 film festivals. It was defined by the critics as "a cult short film".