John, Jack, and Charles are strangers brought together by the Imaginarium Geographica an atlas of all the lands that have ever existed in myth and legend, fable and fairy tale. On the eve of the murder of a caretaker of the Geographica, the men learn that it is now up to them to protect the atlas from the Winter King, an evil conqueror gaining strength in the world of the imaginary. After securing one of just seven ships that can cross into the imaginary lands, the three men set out to find the Winter King before he builds a deathless army that no force on Earth can defeat.