Lady Hannah Simmons is a quintessential wallflower, unassuming, dowdy yet ignored by most. But underneath her plain exterior, Hannah is hiding a thrilling secret! Unbeknownst to the rest of the ton, she is Queen Victoria's leading femme fatale, slipping unnoticed through the streets of London and listening to scandalous whispers from lords and ladies. But with daggers in her stockings and pistols in her pockets, Hannah's mission is to apprehend a deadly killer.

Private Investigator to the Prime Minister, damaged, yet devastatingly handsome ex-war hero Duke Robert Killian always puts duty first. However, when he finds himself competing with the intriguing Lady Hannah on the same daring task, his blood boils with frustration - and desire! Is it possible to seduce this vexing woman whose not afraid to put herself in danger and achieve the upper hand?

Hannah enjoys Killian's attempts to distract and tempt her, but she has never faced an adversary she couldn't overthrow. And Killian has never met a challenge he couldn't conquer...until now. The gauntlet has been thrown, can they finish their jobs and resist the temptation?