Rat Evans knows that they shouldn't have made a deal with Isola, a shadowy raven knight older than the stars and more powerful than the strongest arcanists. They need to search Bellamy Arts for answers on how to get Isola's heart out of the Ingrid Collection. With the help of Jinx, Agatha, and Will, Rat searches for answers, but Evening and his new apprentice are fast on their heels. As Rat tries to use their powers to unravel the secrets of Isola's heart and the Collection, the more they realize how intertwined they may be in all of this, and that their role may be a dangerous and deadly one.