The night before her fifteenth birthday, Rosaline Clayton uncovers a deep family secret. She receives an amulet from her deranged father, and he tells her she must find "the book" in order to save him. Rosaline is used to her dad not making any sense, so she dismisses their conversation as another of his crazy rants. When Rosaline's brother, Elliot, drags her to their nana's attic to explore, they find the old leather-bound book tucked away in a chest. It sucks them into its pages, transporting them to a magical world. Along the way, Rosaline and Elliot are separated, and the only thing she wants is to find her brother and go home. The creatures of Immagica have other ideas. After years of war, their land lies in ruin. Using the amulet's power, they want Rosaline to defeat the dragon and restore Immagica to its former glory. But Rosaline is bound to Immagica in ways she doesn't understand, and when she discovers the truth about her family, she must follow her heart to save them all.