A dolphin serial killer is on the loose and the NTSF don't have any leads until Trent visits the deadliest dolphin serial killer in captivity to get a lead on this new killer... before Sam and Jessie are it's next victims.

An international terrorist who avoids NTSF capture by staying out if their jurisdiction is finally corned on a cruise ship... or is he? Trent goes rogue and pretends he's taking the NTSF team on vacation in a ruse to bust this evil man in international waters. But there's a kink when Piper brings her fiancee on the cruise without informing him of her secret identity.