Ten years have passed since the Enterprise crew brought back humpbacked whales from the 20th century to communicate with a mysterious Probe which threatened Earth. Now the Probe returns and the Enterprise must continue to delve into its mystery.

Teska, a Vulcan child raised on Earth, is destined to play a crucial role in the reunification of the Vulcan and Romulan peoples. While Spock escorts his young niece back to Vulcan, he strives to help her understand both her Vulcan heritage and her growing telepathic abilities. But when an unplanned mind meld reveals the true identity of a deadly assassin to Teska, she and Spock find themselves the target of a Rigelian criminal network.

When the Enterprise arrives at a remote science outpost they find signs of a violent firefight. The station has been raided, but there are no bodies and all personnel is missing.

Lt. Jon Anderson is the newest security officer aboard the U.S.S Enterprise. Starfleet Command fears that the Klingons are gearing up for a major offensive. The Enterprise would be on the front lines of an all-out interstellar war, but Lieutenant Anderson is actually a Klingon infiltrator assigned to sabotage Starfleet from within. His first mission: kill Capt. Kirk.

A new ship to take over the guardianship of Belle Terre from the Enterprise arrives in the midst of a deadly attack on the colony and is destroyed. The Enterprise must fight off a new and powerful enemy that threatens the colony as well as its enemies.

The planet Vok is holding its first free elections after years of oppressive military rule. Captain James T. Kirk and the crew of the Starship Enterprise have been dispatched by Starfleet to serve as impartial observers, but remaining neutral proves a challenge, as Kirk confronts a tangled web of scandal, conspiracy, and assassination plots—with the stability of an entire sector at stake. To make matters worse, Dr. Leonard McCoy has vanished while on a mission of mercy to Braco, a nearby planet only a system away. With Kirk unable to abandon his vital mission on Vok to hunt for his friend, it’s up to First Officer Spock and Christine Chapel to lead a team in search of the missing doctor, even if it means risking whatever fate befell McCoy.

Young biologist Carol Marcus has a project that she believes can reshape planets. She dares to dream of a Federation where there is never any hunger and every world is a paradise. One of Carol’s more enthusiastic team members is botanist Leila Kalomi., who sparks the interest of Spock, who convinces her to join Project: Inception.

Admiral Kirk attempts to defuse a critical hostage situation, Mr. Spock finds the one thing he least expected, and Dr. McCoy finds himself in the middle of an incident that could trigger an interstellar bloodbath.

(follows Errand of Vengeance trilogy) Tensions between the Federation and the Klingon Empire are the highest they've been since the Battle of Donatu V twenty-five years earlier. Even as Federation Ambassador Robert Fox engages in tense negotiations with the Klingon ambassador to maintain the peace, Captain Kirk sees his vessel refit from a ship of exploration into a ship of war.

The threat of the Gateways - portals that allow for travel to other times and places - is finally destroyed, in this explosive conclusion to the Gateways series, in which Captains Kirk, Picard and Janeway, Colonel Kira Nerys, and the crews confront untold perils in the distant reaches of space.

There is sabotage aboard the Enterprise, and Spock's investigation leads him into defiance of the Federation and a bizarre alliance with the Romulan and Klingon Empires against the bloodthirsty Tomarii, a savage race for whom war and battle are life itself.

Kirk discovers that technology he obtained earlier for the sake of peace is being put to sinister purposes as Section 31 sets in motion a plan that could bring the major powers of the galaxy to their knees.