By day, Violet is a supposed charlatan running a potion shop in New Orleans and catering to drunk tourists who want to take a walk on the wild side. By night, she's a Potion Master, a rare, magical being whose shop straddles the portal to Earth and Hell, slinging potions to magical beasts who only come out at night. She's also the protector of both, a neutral being who carefully navigates the Accords between oblivious humans and the creatures who wouldn't mind snacking on them. Unfortunately for both sides, Violet is terrible at her job.

Scarlett Prynne is new in town, but that won't stop trouble from finding the young witch. It always does. Before her brother kicked her through a magical portal that eventually landed her in nowhere Tonopah, Nevada, he called her an agent of chaos. But let's be fair. Our Scarlett doesn't create problems. Her magic just attracts it in all shapes and furry sizes. Like her familiar, Runeclaw. The black cat's tongue is as sharp as his nails, and he has a snark that can cut through just about anything. This time though, trouble was already here.

Kit McCafferty's life is quiet, unremarkable, and filled with cat hair. In the magical city of Coldstream, located on the border between Scotland and England, Kit is viewed as little more than mildly eccentric and mostly harmless. She passes her days caring for her family of five cats, feeding the local feral moggies, and maintaining relatively good relations with her neighbors. All that changes, however, when a teenage werewolf shows up at her door in the desperate hope of renting out a nearby vacant flat.

It’s been more than twenty years since tragedy prompted Luna Valens to walk away from her pack. Scarred by her past, she’s done her best to lead a normal human life. Thanks to a potion that suppresses her magic, nobody around her has a clue that she’s a werewolf. Until… Her potion supplier disappears, her family reestablishes contact, and a mysterious werewolf with a metal detector and a penchant for calling her my lady saunters into her life.

Mary Frances Talbot—Frankie—is a necromancer, probably. Hard to say since she never met her parents. She can see the dead, talk to the dead, and a few other things that aren't strictly legal. It's fine. No worries. As long as she doesn't get caught. The whole not getting caught thing was going well until Samuel Harrow blew back into town wearing a Savannah Police Department uniform. He might be a witch, but he hates magic. He's not a fan of Frankie either. Which explains why he's her ex.