As a young doctor with a lovely family members and a promising medical career, Dr. Leonard McCoy thought he had it all. But when the woman he adored betrayed him, McCoy fled to Starfleet, hoping to reduce his pain in the depths of space. Today, more than forty years later on, the EnterpriseTM and her crew are ordered to transport several mediators to the planet Ssan, a world where assassination is definitely a time-honored custom, and McCoy is normally surprised to discover that his ex-wife, now remarried, is one of the mediators. And before he will come to terms along with his conflicted emotions for his previous appreciate, she and Captain Kirk are captured on Susan, and McCoy is certainly caught in an explosive civil war, the only person with the power to save the woman who once nearly destroyed him.