Five-0's investigation into the suspicious plane crash and death of a customs agent takes an unexpected turn when it is revealed that the victim was dead before takeoff. Meanwhile, Danny finds himself the proud caretaker of an orphaned dog.

McGarrett finds himself in need of the Five-0's help when he goes to North Korea with Jenna Kaye to deliver a ransom to rebels who are holding her fiancé hostage. Meanwhile, the Five-0 investigate the murder of an investigative reporter who seems to have ties to Jenna.