The first international spin-off from NCIS kickstarts on the east coast of Australia. The local Naval Criminal Investigative Service led by Special Agent-in-Charge Michelle Mackey (Olivia Swann) works closely with the Australian Federal Police led by Jim Dempsey (Todd Lasance) to investigate crimes on land and at sea. A crack team including NCIS Special Agent DeShawn Jackson (Sean Sagar), AFP Liaison Officer Constable Evie Cooper (Tuuli Narkle), AFP Forensic Scientist Bluebird Gleeson (Mavournee Hazel) and AFP Forensic Pathologist Dr Roy Penrose (William McInnes) lend their expertise to each perplexing case