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.

After releasing a mythical monster upon the islands, a group of three young friends must use local legends to restore peace to their home.

Following the murder of her family at the hands of her father in the wake of World War I, a young woman is sent to live in a convent. However, the demons that plagued her father follow, reawakening the nightmares of her past.