Beginning a three-part saga which heralds a new era in Star Trek fiction, as the original five-year mission of the Starship Enterprise is thrillingly reimagined through the eyes of the valiant crew members who served under legendary Captain James T. Kirk.

As they barely escape the destruction of a dying planet, Captain Kirk and the crew of the USS Enterprise are catapulted three days into the past by an anti-matter explosion. But their unexpected detour through time soon presents a very real danger, not only to the Enterprise but also to the entire Federation.

In order to avoid meeting their past selves the crew make their way to a remote planet which seems to be an uninhabited paradise. But their peaceful stay is cut short when Captain Kirk and Dr McCoy abruptly vanish. The planet conceals a vortex, and anyone making a wrong move risks being sucked into it. With Mr Spock taking command the crew attempt to uncover the true nature of the planet -- and to discover what has become of the missing Kirk and McCoy. As the story unfolds, it leads to a spectacular and shocking revelation...