A maniac murders teens when they refuse to forward chain mail.

In Ebensse, the teenagers Nina, her boyfriend Martin, Clemens, his girlfriend Alex and Mona are best friends since their childhood. On their high-school graduation day, they all receive the same message in the cellular: "In three days you will be dead!", but they believe is a stupid joke from their weird schoolmate Patrick. However, when Martin is found dead in the lake Traunsee, the group realizes that it is not a prank. When Nina is attacked and Patrick is killed trying to save her, they recall a tragic incident from their childhood.