Washington, DC, 1926. Sorcery opponents have succeeded in passing the 18th Amendment, but the Prohibition of magic has only invigorated the city's underworld. Smuggling rings carry magic contraband in from the coast. Sorcerers cast illusions to aid mobsters' crime sprees. Gangs have even established "magic havens," secret venues where the public can lose themselves in immersive magic and consume a mind-bending, highly addictive elixir known as "the sorcerer's shine."

Joan Kendrick, a young sorcerer from the backwoods of Norfolk County, accepts an offer to work for DC's most notorious crime syndicate, The Shaw Gang, when her family's home is repossessed. Alex Danfrey, first-year Federal Prohibition Unit trainee with a complicated past and talents of his own, becomes tapped to go undercover and infiltrate the Shaws. When Joan meets Alex at the Shaws' magic haven, she discovers a confidante in her fellow partner and he begins to fall under her spell. But when a new breed of the addictive sorcerer's shine is created within the walls of the magic haven, Joan and Alex are forced to question their allegiances as they become pitted against one another in a dangerous, heady game of cat-and-mouse.