The death of an American seaman on a U.S. nuclear submarine during an AUKUS ceremony on Sydney Harbour is investigated in a joint effort between America's NCIS agents afloat and the Australian Federal Police (AFP), on the series premiere
When a US petty officer's body is found in the Sydeny's historic and haunted Rocks area a decades old Navy cross medal holds the clue to solving the murder, leading the team on a world ghost chase to catch a killer.
When the suspicious death of an old Drug Squad colleague pulls Evie back into a secret undercover operation, DeShawn is torn between loyalty to his friend and loyalty to his team.
McKey, Evie, and Blue attend a swanky DoD tech launch party, while JD and DeShawn investigate a murder. Unfortunately, the party turns out to be the more dangerous endeavour.