Elya has spent sixteen years stumbling between the mortal world and the Afterlife-Heaven, Hell, and the shadows between. At twenty-two, she's somehow survived encounters with archangels, Satan, and the Seven Deadly Sins-his sons, in the flesh. Clumsy, overly curious, and eternally in the wrong place at the wrong time, Elya has learned to expect the unexpected. But nothing prepares her for this: an ancient enemy rising to destroy both Heaven and Hell-and she's the one tasked with stopping it. To save the Afterlife, Elya must cross dimensions and recruit an unlikely coalition: the Four Horsemen, reluctant archangels, and the oldest Celestials in existence. But the deeper she digs, the more she realizes something is wrong at the heart of it all-especially with Michael, commander of Heaven's armies. In a divine game of chess, she may be just a pawn... or the queen no one saw coming.