Documentation and tunnel maps found in the missing sheriff's room make even Abby fear he's the killer and Madison's manipulative 'new friend'. Henry gathered the survivors to leave the island by yacht, but when two state troopers arrive to collect J.D., they are snipered, the yacht booby-trapped with the sheriff's oxygen, which almost blows up Shane. Jimmie, who was with him, is later delivered alive to Henry's barricaded party, with a cryptic message which seems to summon Abby. While brave Cal and driver Sully nearly die during a medical evacuation, the sheriff dies explaining to his daughter about a deal and the real killer.
—KGF Vissers