When Eliza's father dies, he leaves her penniless, but she has an ace up her bonnet - her father's business - a private detective agency. To operate in this man's world, she needs a partner. Step forward Detective Inspector William Wellington, who is also known as "The Duke", drinker, gambler and womanizer. Eliza and The Duke strike up a mismatched, fiery relationship that will crackle and smoulder with sexual tension as they team up to solve crime in the murkiest depths of 1880's London.