Five young German women organise a holiday at Lake Garda, with the apparent wish to celebrate their adolescence and bring back to life those little rituals that have consolidated their friendship. Despite the genuineness of their intention, the experience gradually turns out to be catastrophic.
What is supposed to be a marriage boot camp on a remote island turns into the ultimate test for survival when a 6-headed shark starts attacking the beach. Trapped with minimal weapons they try to fight off the shark, but quickly discover that no one is safe in the water or on land.