强尼幼时曾被褓姆在自家泳池中施暴，自此留下阴影，惧怕靠近任何的泳池甚或是水池。然而有钱人的泳池派对，池畔乳波臀浪，春光无限。强尼于是答应好友布兰登一起去帮有钱人清洗泳池，强尼却一时压抑不住，怀著幼时的恨意，失手淹死了豪宅女主人。布兰登知道后，居然怂恿强尼再次前往另一个豪宅的泳池派对，强尼这次失手淹死了一名A片女优。警方…

It was supposed to be an adventure of a lifetime as three young girls spend the summer in Thailand. But their adventure quickly becomes a nightmare when the trio unleashes the spirit of a murdered child with only one thing on her mind - revenge.