Once, serial killer Alvie Knightly was living the dream. Unlimited cash. An Italian getaway. A hot new boyfriend... How the mighty fall. One year—and one unfortunate incident with a shotgun—later, Alvie is living in a London hostel, living off meal deals and counting her dwindling pennies. So far, she's kept her head down. But when a cop shows up at her home, Alvie freaks out. It's time for action, and if anyone can pull off one last hit—in six inch heels—it's Alvie. But if she's to succeed in her mission to avenge her ex, win back her money and secure her future, she'll have to face her most terrifying enemy yet: her past.