Jenkins discovers there is something wrong with the library; the librarians are drawn together to solve the mystery of a massive storm that is parked over Manhattan.
Prospero summons other fictionals in order to retrieve parts of his staff; the librarians find themselves pitted against Frankenstein's monster and Sherlock Holmes' nemesis Moriarty; Flynn and Baird have a disagreement.
Stone, Cassandra and Ezekiel team up to investigate a cave-in at an oil rig site which has unleashed a shape-shifting god who grows in strength when lies are told.
When students begin disappearing at Wexler College, the librarians head out to investigate; Cassandra gets an offer that is difficult to turn down.
Flynn is kidnapped by a mysterious stranger with both amnesia and a collection of the library's missing artifacts; the group pursues the Staff of Zara-thustra.
Baird's old friend finds himself embroiled in a scandal in the form of a missing intern and a contract with the devil; Baird must battle 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 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?
The Librarians discover that Prospero's renewed magic is wreaking havoc with the technology of the world. He is recreating an idyllic forest utopia, whether we want one or not. In order to stop him, Flynn and Baird must travel back to 1611, while the rest of the team battles Prospero in the present. Little do they realize that they can only defeat Prospero in each time by finding a way to work together - separated by five centuries.