A December trail ride in the haunted Superstition Mountains of Apache Junction, Arizona, becomes one of terror and death when uninvited guests appear. Gina McHenry's group of 30 students and teachers extended the ride unknowingly through the haunted Massacre Grounds, home to a harbor of six ghosts stuck there since 1948. Ghost-weary wranglers abandon the group, leaving Rick del Rio guiding everyone out of the chaos and terror during a late-night snowstorm. Original