Elle and gang are in the one place they never expected to find themselves. Hell. Literally. There's a dark force stirring. One that's killed thousands during its time. It's been asleep for eons but it's awakening now. The question is why? And how can Elle stop another mass genocide from impacting all of Grimm? Together there's a chance she and Crowley and Hatter can defeat this terrible darkness, but the beast is always one step ahead of them, using their own fears against them. Friends, lovers, allies... Elle's not sure she can trust any of them right now, not with the darkness playing games with them and yet to stop the creature's game they must overcome their darkest impulses. Stopping the darkness might just be the single most difficult thing Elle's ever done, but if she doesn't figure out how to solve his macabre riddles in time all of Grimm could suffer.