Lady Rosamund’s plan for a quiet return to London society goes awry when she rescues a woman fleeing along the road—the mistress of her brother, Lord Derwent. Rosamund takes her in, meaning to sort matters out with Derwent—but he has left town in a hurry, and soon the Bow Street Runners are after him for murder. If that wasn’t trouble enough, several suitors are vying for Lady Rosamund’s hand.

Luckily, Gilroy McBrae is in London to help Rosamund save her brother. Will their strained relationship, along with his rivals for her heart, impede the race to unmask the real murderer before Derwent is caught and hanged?