After defeating the Wolves, Jailah, Logan, Iris, and Thalia want nothing more than a summer of fun and relaxation. But there is no rest for the wicked, especially when Death comes for Iris. She is to become a Reaper, tasked with banishing souls who refuse to cross over. But Iris suspects there's something more ominous going on when Mathew's role as her tether grows sinister.

Logan and Thalia are ready to prove themselves as witches. Except Logan still hears the howling Wolves and realizes that the Haunting Season may have awakened more than just her magic. And while Thalia wants to spend her days cleansing the Swamp for good, she finds herself heading to a place she swore she'd never go again: home. Witches have started going missing near Annex, and Thalia is convinced that her father is behind the disappearances. With the help of Logan and Trent, Thalia returns to stop him.

Meanwhile, Jailah is focused on her internship with the Haelsford Witchery Council until she discovers a treacherous magic hidden beneath Mesmortes, and there are those who will go to great lengths to keep it buried. So, she turns to the only person who understands, even if it's the one witch who hates her the most.

Separated by distance, the coven is surrounded by magical and mundane threats that must be defeated before they lose their witchery--and each other--forever...