Taking over after the death of her mother, Sela, Skye Mathers is the new Guardian of the Nexus. With the help of Shang, her mentor, she is learning the extent of her new powers, and trying to figure out the mystery of her connection to the book of Fairy Tales. Now, with Merlin in control of the book of Fairy Tales, the Age of Camelot has been brought to the Grimm Universe. Skye must find a way to get her book back and put an end to the misuse of its power on our world.