A thrilling Star Trek adventure begins! A new mission: The late twenty-third century—Starfleet’s golden age of exploration. Desperate to stay one step ahead of its rivals, the Federation sends two starships, the scout Sagittarius and the cruiser Endeavour , to plumb the secrets of the vast region known as the Taurus Reach. A doomed race: Drawn by mysterious energy readings to a lush green world, the crew of the Sagittarius find the Tomol: a species whose members all commit ritual suicide just as they reach the cusp of adulthood. An old foe: The crew of the Sagittarius wants to save the Tomol from their cycle of self-destruction, but first they’ll need to save themselves—from the most nefarious Klingon starship commander in history.