Mack receives a mysterious letter telling him to meet at the shack. He takes this as an evil prank. 4 Years ago, Mack and his son and daughter went camping when tragedy struck. While Josh was bike riding he lost control and fell injuring himself. In the meantime, Missy was kidnapped from the campgrounds. Later that day, the police calls Mack asking more questions. In the morning he gets another phone about a shack they found with Missy’s clothing inside. That day, he goes with Officer Dalton and goes to the shack to identify the dress - it’s hers. 4 years later, continuing from the day he got the letter, he takes his friends car to the shack to meet the mysterious person who sent him the letter.