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.

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.

Five friends arrive at a party, fully unaware that the special night is just a cover for an evening of torture and murder.

When a cold hearted telecommunications executive returns to his small island town for his estranged mother's burial, he learns about the true Taiwanese tradition that mandates him to marry within 100 days so that the parent's spirit can transition peacefully. When a typhoon leaves him stranded for 3 days, he rekindles romance with his free spirited, childhood sweetheart who is engaged to marry a local villager/step brother.