Dean, Sam and Bobby head to a town in New Jersey where the remains of locals have been found after the attack of a creature that they believe might be the Jersey Devil. Dean and Sam interview the Ranger Rick Evans, who seems to be stoned, at the Big Gerson's restaurant, and then they have lunch with Bobby. Dean eats the Big Gerson's sandwich with three different meats and soon he shows strange behavior. Sam and Bobby learn that the sandwich is affecting the locals and they decide to investigate the supplier, and discover that the locals are part of an experiment of the leviathans led by Dick Roman. When Bobby is captured by four leviathans, Dean and Sam question how they can rescue Bobby.