NCIS is tasked to protect the daughter of a Russian oligarch carrying a deadly secret. Meanwhile, Sam asks Tennant for a favor.

An accident on Mars strains relationships, while Miles embarks on a risky venture.

Miles tries to make ends meet. Margo finds herself pulled into a dangerous situation.

Eight years later, a new mission begins: Capture an asteroid. Aleida and Danielle are still haunted by events from the past.