Scarlett Bernard is used to cleaning up messes. As a human who cancels out any magic around her, Scarlett's job is to keep the supernatural world hidden - at any cost. But on the eve of the Vampire Trials, a two-day tribunal that allows the otherworldly community to air their grievances, Scarlett receives a blood-soaked message from Molly, her estranged former roommate. Molly, a vampire, had been living with 12 human college students...and in one terrible night, she slaughtered them all.

When LA’s vampires, witches, and werewolves make a mess, they call Scarlett Bernard to clean it up. Her ability as a null erases all magical traces from anything — or anyone — that comes within ten feet of her, and keeps humans in the dark about the city’s paranormal activity. One night when she’s called to a grisly crime scene, Scarlett is spied by the all-too-human LAPD cop Jesse Cruz, who strikes up a deal with her: he’ll keep quiet about the supernatural underworld if she helps him crack the case. She agrees, but the city’s chief vampire, Dash, starts to suspect Scarlett is behind the murders and will reveal all she knows of his shadowy empire. Now it’ll take more than Scarlett’s unique abilities to clear her name, keep the underworld underground, and track down the real killer.

Let's get one thing straight - Ivy Wilde is not a heroine. In fact she's probably the last witch in the world you'd call if you needed a magical helping hand, regardless of her actual abilities. If it were down to Ivy, she'd spend all day every day on her sofa, where she could watch TV, munch junk food, and talk to her feline familiar to her heart's content. However, when a bureaucratic disaster ends up with Ivy as the victim of a case of mistaken identity, she's yanked very unwillingly into Arcane Branch.

As a cassandra sangue, or blood prophet, Meg Corbyn can see the future when her skin is cut - a gift that feels more like a curse. Meg's Controller keeps her enslaved so he can have full access to her visions. But when she escapes, the only safe place Meg can hide is at the Lakeside Courtyard - a business district operated by the Others. Shape-shifter Simon Wolfgard is reluctant to hire the stranger who inquires about the Human Liaison job.

On the outside, Dina Demille is the epitome of normal. She runs a quaint Victorian Bed and Breakfast in a small Texas town, owns a Shih Tzu named Beast, and is a perfect neighbor, whose biggest problem should be what to serve her guests for breakfast.