Even death cannot stop true love. Rose and Chelle have found each other again, but all is not well in the depths of the Underworld. Moments after they are reunited, the palace guard arrested Chelle for her part in liberating the dreaded Zabasha from her eternal prison. Chelle's only chance at a fairy tale ending rests in her ability to infiltrate the terrorist organization harboring the Unseelie Queen and neutralizing the threat she poses to the realm. Meanwhile, Red inches her way through the endless snow of Helheim seeking to bring the rogue god Epialas to justice while Rose has given herself as collateral for Chelle's temporary freedom, her fate intrinsically linked to whether Zabasha can be captured before Hell is razed to the ground. In the Fairy Realm, Gwen and Lucy face off against a furious Nimue tasked with killing Gwen's boyfriend before he can wage war against the Seelie Court. Join the heroines of The Obsidian Spindle Saga as they work to save two realms from utter destruction in The Dark Prince.