Steve Mcgarrett Catherine Rollins Harper Dark These 3 were best friends they did everything together in high school Harper was in love with Catherine and Steve knew that Harper was always second best to Steve people would ask her about him they'd use her to get to him so when they were 18 Catherine and Steve announced they were dating everyone was happy except Harper she left the Mcgarrett house that day and no ones seen her since that was 10 years ago no one realizes she went underground and started her empire she created the most dangerous most feared crime organization that's ever been seen on the island she knows Adam Noshimurai and he knows her past with Catherine and Steve he agreed to keep her secrets as his loyalty lies with Harper so what happens when Five - 0 arrests 2 of her people and adam realizes who they are ?? I