一条美人鱼从太平洋上被撕裂，尾巴被切掉，她被扔进了一个精神病院，在那里没有人相信她是美人鱼。

　　Life takes a terrifying and unpredictable turn for Tyler & Chelsea when they begin to receive menacing phone calls from a seemingly unstable woman who insists that Tyler's her ex-boyfriend.