Sensing something ominous afoot, Claude reconnects with his brother Seale in Tennessee, while Holly, Ralph, Yunis and Andy follow him in hopes of isolating the evil force and thwarting its next kill. Meanwhile, a family visiting a local cave festival narrowly avoids a dangerous encounter.

After obscuring their true purpose in town from local police, Ralph and Yunis interview witnesses from the cave festival, while Holly and Andy visit the scene. Later, the group considers its next move as Claude deals with the weight of his role.

The group finds itself in a climactic showdown in their last-ditch, desperate attempt to root out El Coco.