A documentary crew arrives at Mt. Mystic State Park, where a mysterious monolith has appeared. Interim Lieutenant Joshua McMahon prepares to exit his temporary position for his dream job as a National Park ranger. Maintenance ranger Hutch Van Zant must clear out a dangerous rattlesnake pit before the incoming lieutenant arrives. Law Enforcement ranger Ed Durst takes an interest in the new ranger-in-training, Gale Marsh. Ranger Winter and Ranger Abraham question some fishermen, and a new junior ranger joins the team.