John Hayden, a death deity, takes seventeen-year-old Pierce Oliviera back to the Underworld against her will to keep her safe from the Furies, but her family is still at risk and she, herself, may never escape his captivity.

"Abandon all hope... as the most infamous villain in the Turtles' universe, Shredder, returns! Oroku Saki's death is just the beginning, and his journey through the depths of the underworld proves to be anything but a divine comedy. How much of Shredder's soul will remain after he faces the horrors of hell, and as his twisted path leads him deeper through the underworld, will he be able to survive an onslaught of demonic forces? Or, more importantly--the...