One year after the earthquake at the Taum Sauk, Crystal is finally allowed to go on an archaeological dig with her parents, who are excavating a mysterious gravesite near the Current River in the Ozark Mountains. Her friends, Joseph, Will, and Robin, join her to go trail riding near the site when the region is suddenly threatened by a devastating wildfire. Crystal must call upon her courage to help find Robin's lost horse, Shotgun, as well as help save the treasures of the Current, ancient and new.