Kai the skinwalker has been raised by all sorts of animals at the Den, which is a place for all exiled, rare, and forgotten creatures, including selkies, werewolves, demons, and fallen angels. Her best friend Celeste is a demon, and together they go on all the adventures you could think of. Then one day, the day Kai turns 16, her skinwalker powers start to surface. She starts running off into the night, morphing into her super-scary form, and killing anything in her sight. But she has to save the world... when her HUGE crush is right next to her all through it?