A man discovers a photo from 1982 that confirms his brother-in-law was not where he said he was when his wife (the man's sister-in-law) was murdered, prompting the man to call people in an attempt to solve a 35-year-old murder mystery.
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.