Continuing a fresh approach to Star Trek adventure! In the powerful conclusion of this flagship trilogy, the fate of the future depends upon not only Captain James T. Kirk, but also those who serve under his command, braving the myriad perils and challenges posed by strange new worlds and civilizations....

Thanks to the accidental triggering of an ancient alien technology, Captain Kirk has been banished to his own past. During a brutal massacre on Tarsus IV, Kodos the Executioner entered the history books as one of the most genocidal tyrants of the twenty-third century. As a boy, Kirk barely survived. Can he stand by now and let it happen again?

Lt. Kevin Riley is the only other survivor of Tarsus IV serving aboard the U.S.S Enterprise. His traumatic memories provide Spock's best hope of finding their time-lost captain -- before Kirk alters their time line forever!