Jane and Jason, two North Carolinian teenagers, discover a strange, magical map during Saturday morning chores. It carries a summons from another realm - a call for help. In a matter of hours, they find themselves presented with a choice: should they face a deadly test that may prove them to be the saviors of the realm, or should they try to escape their strange surroundings? Meanwhile, siblings Brian and Carrie Gibbs set sail on a mission to fulfill a centuries-old family promise...but a terrible threat awaits them on their voyage.