After a year of unconsummated marriage, Grace ventures into a forbidden brothel, desperate to learn the art of seduction to please her indifferent husband. Her quest backfires when she's seized by Sebastian Voss, the city's most feared mafia king. He sees what her husband never did—a natural submissive, a soul meant to be claimed. Sebastian makes a wager: he will awaken her deepest, darkest desires through a regimen of strict training and ruthless seduction, betting she will beg to stay. Grace fights to return to her cold marriage, but as Sebastian's control ignites a fire within her she never knew existed, resistance crumbles into obsession. Now, she must choose: the safe, sterile life she left behind, or the intoxicating, dangerous surrender to the man who turned her on… and turned her world upside down.
