Inspired by a true story. A grieving mother enlists the help of her deceased daughter’s friend to track down her killer and wonders if the killer is someone close to home.

A newly married couple's vacation retreat is suddenly derailed when the husband, ultra successful business tycoon David Dolan, is suddenly kidnapped and held for ransom. It's up to David's trusty assistant Portia to negotiate the terms and figure out who is behind the abduction.

Thomas Magnum, a decorated former Navy SEAL, returns home from Afghanistan and applies his military skills to become a private investigator in Hawaii taking jobs no one else will—with the help of fellow vets T.C. Calvin and Rick Wright, and former MI:6 agent, Juliet Higgins.

Steve McGarrett returns home to Oahu, in order to find his father's killer. The governor offers him the chance to run his own task force (Five-0). Steve's team is joined by Chin Ho Kelly, Danny "Danno" Williams, and Kono Kalakaua.