The Librarians' first solo mission hits a snag when Baird loses the others in a mysterious Labyrinth that magically exists below the skyscraper of a modern corporation.

An investigation into a missing person uncovers what appears to be an alien invasion.

The Clipping Book sends the team to a high-tech research facility, where the researchers have been turned into mindless monsters by some bizarre power source in the center's lab. When they disconnect the artifact, however, they find themselves stuck in a time loop.

The team has scattered, all living the ideal versions of their lives. Soon these “strangers” are drawn together to solve a supernatural mystery – the appearance of Ariel, the sprite bound to Prospero's service. Can the Librarians do what no other human has ever been able – turn their backs on their own ultimate happy endings?