Exiled, excommunicated, and with a bounty on his head, Athelas is lying low in Seoul for exactly one reason: he has a wedding to attend. Whether or not he's welcome is another matter. Luckily for Athelas, several bodies have turned up with their soft insides gnawed out, whether by magic or Behindkind—and the latest of those bodies is at the very wedding hall he has been staking out. The Behindkind investigators suspect one of Athelas's housemates: YeoWoo, a gumiho with a thirst for revenge and an even greater appetite for soft underbelly than Athelas.

I can turn into a housecat. It’s a fun magic, except in a world filled with vampires and werewolves, it doesn’t exactly make me a powerhouse. Instead, the supernatural community has classified me as an outcast, which means one thing: picking on me is open season all day, every day. The local fae are the worst of all, and it’s during one of their regular “capture the cat-girl” sessions that I shift into my cat form and meet HIM for the first time.

When you get up in the morning, the last thing you expect to see is a murdered guy hanging outside your window. Things like that tend to draw the attention of the local police, and when you're squatting in your parents' old house until you can afford to buy it, another thing you can't afford is the attention of the cops. Oh yeah. Hi. My name is Pet. It's not my real name, but it's the only one you're getting.

There's a body beneath the skip bins. Fae on the forklift. A vampire in the manager's office. And there's definitely something skeevy going on in the locker rooms. Hi. I'm Pet. Well, not exactly Pet. I am a pet. I was meant to stay out of it, but somebody's gotta do something when humans are being killed by Behindkind creatures.

By night, they fight in a dangerous game of cat-and-mouse. By day, they are friendly next-door neighbors. Neither of them know that their alter egos are archenemies. I’ve spent my life training in the family business of slaying vampires, but I’m tired of all the death. I want to prove we slayers can help society, not just break it. I start my new life by joining the Magiford supernatural task force, which exists to protect humans and supernaturals from harmful magic.