The Halifax Hellions are the most scandalous, outrageous, ungovernable ladies in London. From the day of their debut—in which Matilda smoked a cheroot and Margo tied a cherry stem in a knot with her tongue—they’ve turned the ton upside down. But when Matilda elopes with a dangerous aristocrat, Margo must stop her twin before this new misadventure becomes a permanent marriage. For help, Margo turns to her brother’s best friend—because if anyone can get them to Scotland in time, it’s starchy solicitor Henry Mortimer.

Henry Mortimer has precisely one secret in his otherwise buttoned-up life: he’s been in love with Margo for seven wonderful, agonizing years. When she turns up at his doorstep, soaked to the skin and desperate for his help, he cannot turn her down. A week alone in a carriage with the object of his desires an arm’s length away? Surely he can survive that. He hopes.

But the road to Scotland is paved with disasters—caves and crashes and the bloody rain that keeps forcing Henry to hold a damp, shivering, dreadfully tempting Margo in his arms. Only an unstoppable force could drag the truth of Henry’s affection from his lips. Unfortunately for him, Margo Halifax has yet to be stopped.