After MARK finds out that his uncle passed away and left a cabin on the lake to him and his family, he invites 7 friends to join him on what was supposed to be a sexy fun filled week with bikinis and booze. The group quickly finds out that strange things are happening on the lake and this isn't going to be the party they were hoping for.
One by one they find themselves in danger as a psychotic killer is on the loose. As things get deadly they realize that the ones they call friends might be the ones who put them in danger. It's a game of survival as MARK and his friends try to make it out alive from a party that went bad on Ripper Lake.