Diana Bishop, historian and witch, accesses Ashmole 782 and knows she must solve its mysteries. She is offered help by the enigmatic Matthew Clairmont, but he's a vampire and witches should never trust vampires.
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.