When a ghost haunts a bookstore and releases fictional characters into the real world, a group of friends works to solve an exciting mystery surrounding the ghost's unfinished business. While tackling the big mystery, the young heroes embark on six curious adventures with characters inspired by L. Frank Baum's story "The Wonderful Wizard of Oz"; author Pablo Cartaya's "¡Leo! El Magnífico"; Beverly Cleary's novel "The Mouse and the Motorcycle"; Mick Jagger and Keith Richard's song "She's a Rainbow"; E.B. White's book "Charlotte's Web"; and Jewell Parker Rhodes' tale "Bayou Magic".

In its second season, the series' young heroes work to save their bookstore and discover the true identity of the Ghostwriter while introducing audiences to fresh tales like "Malia and the Magic Paintbrush" and "The Cobalt Mask", and familiar literary characters including Dr. Watson of "Sherlock Holmes" fame.

Season 1 follows four kids who are brought together by a mysterious ghost in a neighborhood bookstore, and must team up to release fictional characters from works of literature.