The legend of the Ancillary flower has existed for centuries. Foretold to bring out the limitless potential of its bearer, the flower and the legend have been forgotten by many. Recently, strange events in a shrouded Tibetan town have sparked rumors among those who still believe. Jacob Deer is a quirky young man, bound for college, with an eccentric old librarian for a best friend, an obsession with sitting down in elevators, and a strange birthmark on his hand that's shaped mysteriously like the markings on the Ancillary's petals. When Jacob's mentor Mr. Maddock reveals to him his connection with the legendary Ancillary, it sets in motion a series of events that sends Jacob and friends across the world. Alongside an alluring young woman, a marine-reject, and a Tibetan kid obsessed with comic books, Jacob must face off against a vengeful maniac for the fate of the flower, the legend, and all mankind.