As NCIS investigates a suspicious death and the missing key piece of evidence is a top secret, high tech battery, Pride and the team realize there could be deadly consequences if it falls into the wrong hands.

When a Navy therapist with a high level of security clearance is murdered, Pride and the team discover that she was working around the system to get justice for victims of sexual assault. Also, Carter's mother confronts him when he refuses to talk to the FBI for a background check on her behalf, and Sebastian starts to form a bond with a key witness who was hit hard by the COVID-19 pandemic.