With Mystery, Inc. on the tail of a strange object in Nowhere, Kansas, the strange hometown of Eustice, Muriel, and Courage, the gang soon find themselves contending with a giant cicada monster and her winged warriors.

While the gang travel to Scotland to visit Daphne's cousin and witness the Highland Games, they find themselves terrorized by the legendary Loch Ness Monster.

Gunner and his mother share a special bond. She supports his daydreaming and artistic pursuits, while his frequently-on-the-road father, Amos, with whom Gunner shares a strained relationship, has other ideas about where his son’s interests should lie. Gunner and his dad attempt to smooth over their differences for the sake of the family, but when his mom’s sickness worsens, Gunner disappears into stacks of books on both science and the supernatural in search of possible cures. When Gunner and his rebellious friend Jo go missing during their quest into the Water Man’s mysterious forest, Amos must immerse himself in his son’s world to find them and put his family back together.

An evil sorceress transports the gang back to the age of chivalrous knights, spell-casting wizards, and fire-breathing dragons.

In 1960s Alabama, an orphaned young boy staying with his grandmother at a hotel, stumbles across a conference of witches and gets transformed into a mouse by the Grand High Witch.

Açela and her friends embark on an enchanting journey deep into a mysterious forest to discover the village's legend of the Tale-teller.