The Xondaii system is home to a unique stellar phenomenon: a spatial rift which opens every 2.7 Earth years and allows access to a small planetoid that orbits in proximity to the system's fourth planet. Science vessel U.S.S. "Robert Ballard" is severely damaged during its mission to the system, and the U.S.S. "Enterprise" is dispatched to investigate and render assistance

"For years Starfleet Intelligence agents have carried out undercover assignments deep within the Klingon Empire. Surgically altered and rigorously trained in Klingon culture, they collect information and infiltrate the highest levels of imperial power. When three of Starfleet's longest serving agents initiate emergency extraction procedures, their planned rendezvous with the USS Endeavour goes awry. Captain James T. Kirk and the crew of the USS Enterprise...