Virtue

Sixteen years after a grisly murder at a small town lake, a group of teens decide to celebrate graduation with a party on the very spot. Local legend set aside the group heads to the water but run into a gang of bikers who just happen to be camping just across the lagoon from them. After the local sheriff warns both camps to leave each other alone someone turns up dead and both parties blame each other for the tragedy until one by one they are picked off by an unseen killer.