While grieving over a death, Mika takes his older cousin, Kekoa, to haunted spots around Oʻahu to prove the existence of the afterlife. They discover that each handles loss in exceptionally different ways.
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.