Ever since she can remember, Lyra Corvin has dreamed of becoming a Grim Reaper. So, when her mentor presents her with her first solo reaping, the young girl eagerly accepts, determined to prove she has what it takes to join the agency. Until everything that can go wrong does go wrong. Now, she's stuck with an (understandably) furious Casper William, a young boy whose soul is caught between the realms of life and death. To put Casper back into his body, the unlikely pair must journey into the Underworld to search for answers. But monstrous creatures and sinister secrets lurk within the land of the deceased that could forever alter the lives of our heroes. Will Lyra and Casper have the strength to thwart the looming threat, or will a long-forgotten secret come back to haunt them?