James hires Josh as a guide while his mother, Sheriff Karen Riley, eventually finds Sean's remains.

James manages to convince Karen that a 40-foot plesiosaurus is behind the killings, after they send a skin sample to the Zoological Institute on the mainland that matches no known species of reptile.

Sheriff Riley, Murphy and Deputy Neil Chapman spot Josh's flare and track the creature and her offspring to the magnetite mine on the island.

Sheriff Riley and Josh manage to kill some of the offspring, Neil dies after running out of ammunition and being attacked by the babies.

Josh and Zoe are reunited and Sheriff Riley asks if James will now start to "hunt for Bigfoot", to which he replies that he will instead probably find a nice small town to call home.