I don’t remember the title of the movie but I’ll try to describe it.

A group of friends arrives at a countryside house during a holiday. One of the girls begins to experience strange events—her car starts on its own, and objects move around. Her boyfriend tries to comfort her, but they end up performing some kind of ritual in the water.

It turns out that the girl and her sister, along with her sister’s boyfriend, had accidentally killed another girl with their car some time ago. The ghost of this girl starts haunting the sister, and she eventually dies. Afterward, the ghost begins haunting the main character, leading her to the dead girl’s body. In the end, her boyfriend confesses that he accidentally killed the girl.