"The Lost Years" tells the story of Captain Kirk's final hours in command of the USS Enterprise, and how he, Mr. Spock, and Dr. McCoy struggle to establish new lives apart from each other and the starship.

We see the newly promoted Admiral Kirk, in charge of a specially created Starfleet division, as he attempts to defuse a critical hostage situation; Mr. Spock, who in the midst of a teaching assignment on Vulcan, finds the one thing he least expected; and Dr. McCoy, whose unerring instinct for trouble lands him smack in the middle of an incident that could trigger an interstellar bloodbath...