Dinah has kept a secret affair from Mike for the last two years. Going against the advice of her therapist, Dinah can't help but break the news to him and beg for his forgiveness. She decides to take him on a camping trip to his favorite place, Cicada Lake...but once there the couple encounters a group of injured hunters who claim they have been attacked by a beast that they've never encountered before. Terrified, the couple takes shelter until they realize that the attacker is someone that they know and Dinah realizes that her husband Mike has secrets of his own.