Just as he is about to retire, middle-aged assassin Henry Brogan discovers he is a target and the person hunting him is a younger clone of himself that can anticipate his thoughts and actions.

Dispatched on a rescue mission to the farthest reaches of space, the USS Enterprise is ambushed by Krall, a ruthless enemy sworn against the Federation. Crash-landing on an uncharted hostile world, Captain Kirk, Spock, and the crew are separated with no means of escape. Only Jaylah, a rebellious alien warrior, can help them reunite and find a way off the planet in a race against time to stop Krall's deadly army from triggering all-out galactic war....