William Riker, former first officer of the USS Enterprise in Star Trek: The Next Generation, takes command of the new USS Titan in this white-knuckled adventure perfect for longtime and new Star Trek fans. After almost a decade of strife against foes such as the Borg, the Cardassians, the Klingons, and the Dominion, the United Federation of Planets is at the dawn of a new era. Starfleet is renewing its mission of peaceful exploration, diplomacy, and the expansion of knowledge. Among the starships spearheading that endeavor is the USS Titan, commanded by Captain William T. Riker and manned by the most biologically varied and culturally diverse crew in Starfleet history. But their mission does not begin according to plan. In the wake of Star Trek: Nemesis, Praetor Shinzon, slayer of the Romulan Senate, is dead. The power vacuum created by his demise has put the Romulan Star Empire, longtime adversary of the Federation, at the brink of civil war. Competing factions now vie for control of their fragmenting civilization, and if the empire should fall, that entire area of the galaxy may destabilize. To restore order to the region, Titan’s long-anticipated mission of exploration is delayed as Starfleet assigns Riker to set up power-sharing talks among the Romulan factions. But even as the first tentative steps are taken toward building a new Romulus, the remnants of the Tal Shiar, the dreaded Romulan intelligence service, are regrouping behind the scenes for a power play of their own. With no other help available, Riker and the Titan crew become the last hope to prevent the quadrant from falling into chaos.

As the Federation recovers from the devastating events of Star Trek: Destiny, Captain William Riker and the crew of the U.S.S. Titan are ordered to resume their deep-space assignment, reaffirming Starfleet's core principles of peaceful exploration. But even far from home on a mission of hope, the scars of the recent cataclysm remain with them as they slowly rebuild their lives. The planet Droplet is a world made mostly of water without a speck of solid ground. Life should not exist here, yet it thrives. Aili Lavena, Titan's aquatic navigator, spearheads the exploration of this mysterious world, facing the dangers of the vast, wild ocean. When one native species proves to be sentient, Lavena finds herself immersed in a delicate contact situation, and Riker is called away from Deanna Troi at a critical moment in their marriage. But when good intentions bring calamity, Lavena and Riker are cut off from the crew and feared lost. Troi must face a life-changing event without her husband, while the crew must brave the crushing pressures of the deep to undo the global chaos they have triggered. Stranded with her injured captain, Lavena must win the trust of the beings who control their fate -- but the price for Riker's survival may be the loss of everything he holds dear.

With nothing left to lose, the Romulan Star Empire engages in all-out war against humanity, determined once and for all to stop the human menace from spreading across the galaxy. At the start of the twenty-first century, unconditional war swept across the Earth. A war that engulfed the great and the small, the rich and the poor, giving no quarter. Each side strove for unconditional victory, and as battle built upon battle, the living began to envy the dead. Chastised by the cataclysm that they had unleashed, the governments of Earth came together. Humanity vowed to put an end to war and to strive for the betterment of every living creature. A united Earth created Starfleet, an interstellar agency whose mission was to explore the cosmos, to come in peace for all mankind. It was a naïve wish that was battered by interstellar realities, yet man persists in the belief that peace is the way. Banding together with other powers to form a Coalition of Planets, humanity hopes that the strength each can offer the other will allow for peaceful exploration. However, the rise of the Coalition strikes dread within the Romulan Star Empire. They feel its growing reach will cut them off from what is rightfully theirs. The Romulans know that the alliance is fragile, that the correct strategy could turn allies into foes. Perfecting a way of remotely controlling Coalition ships and using them as weapons against one another, the Romulans hope to drive a wedge of suspicion and mistrust between these new allies. One Starfleet captain uncovers this insidious plot: Jonathan Archer of the Enterprise. Determined not to lose what they have gained, outmanned and outgunned, the captains of Starfleet stand tall, vowing to defend every inch of Coalition space until the tide begins to turn.