This is a heavy episode for McGee. We see his softer side as he grapples with the loss of a young man he viewed as a younger version of himself. His tech expertise is crucial in deciphering the complex code Billy left behind.
As the team digs into Billy's life at the academy, they discover he was a brilliant student involved in a highly sophisticated, secret "gaming" group that used high-level coding and strategy. The investigation leads NCIS into the world of professional high-stakes gambling and corporate espionage, as they realize Billy’s "gaming" skills were being exploited for much more dangerous purposes than just entertainment.
The episode kicks off when a young midshipman, William "Billy" Baker, is killed in an apparent hit-and-run accident after falling (or being pushed) into the street. The investigation takes a personal turn for the team, as it's revealed that Billy was a close friend and mentee of .