Upon receiving a mysterious letter that her mother's grave has been vandalized, Marie travels to the desolate island town where she's buried. Just as she arrives, the island closes for the season, leaving Marie trapped in a nightmare.
Hanna notices some suspicious activity at a nearby cabin while she's kayaking by herself in a remote lake. Believing the woman and her daughter staying there might be in danger, she notifies the authorities. After the authorities find nothing wrong or unusual, they brush off Hanna. When she looks in on them, it sets off a deadly cat-and-mouse game of survival.
What happens when revenge has mutated into a type of madness?
