Stone, Cassandra and Ezekiel have a proper team-up for the first time in months when they investigate a cave-in at an oilrig site, which has unleashed Hokolonote, a shape-shifting god who grows in strength any time a lie is told. Now the Librarians have to come clean to each other, airing their issues and solving the riddle of the ancient prison that held Hokolonote.

While chasing one of the Library's missing artifacts, Flynn is kidnapped by a mysterious stranger with both amnesia and a collection of all the Library's missing artifacts. Soon all of them are in pursuit of the Staff of Zarathustra before it falls into the hands of Prospero.

An old friend of Baird's is running for Mayor of a small New Hampshire town and finds himself embroiled in a scandal in the form of a missing intern and a literal contract with the Devil. Baird soon finds herself in a battle not only for her own soul, but also for the souls of all the Librarians.

When people begin suffering the effects of accidents and sins in which they have not actually been involved, the team tracks the connection to the perpetually young Dorian Gray, whose magic now works on selfies.

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?

When the Egyptian God of Chaos inhabits a human body, he attempts to release Pure Evil into the world, thus beginning the final battle of Good vs. Evil. In order to stop him, the Librarians must decipher a series of clues within a science museum, including a mysterious warning spoken by exhibit mannequins that have come to life.

A routine artifact retrieval is anything but when the artifact grafts itself to Cassandra. Meanwhile a blizzard forces Stone and Cassandra to take shelter at a mysterious hotel that is hosting a demon convention, who want the artifact for themselves.

The obnoxious Cindy Kroger has suddenly become super-popular thanks to a magical love potion. The Librarians must stop her before she launches a love missile that would force the whole world to become her fan base.

The Librarians' two-front battle comes to a head when the Library is simultaneously infiltrated by DOSA and Apep. Flynn, Baird, Stone, Cassandra, Ezekiel and Jenkins must all put aside their differences in an attempt to save the Library, the world and themselves.

When Flynn and Baird are sucked into Baird's favorite classic Film Noir movie, the Librarians are drawn into the world of movie magic - literally - where they'll need to perfect their lassoing skills, sharpshooting, and snappy dialogue if they're going to make it out alive.