Nicholas B. Gianforti

Still reeling from the murder of one of their ohana, Steve and Catherine, along with Danny, Junior and some old friends, Harry Langford and Wade Gutches, hunt down the killer. Also, Tani and Grover investigate when a bag of human bones, discovered inside an abandoned storage locker goes missing.

A Christmas Eve ransomware attack on the Honolulu Police Department forces Lia (Chantal Thuy) to reveal a family secret to Magnum and Katsumoto.

When a crime lord moves against the family of an undercover NYPD detective who infiltrated his organization, it's up to Five-0 to stop the policeman from exacting revenge.