To claim the Underboss throne of New York's deadliest crime syndicate, ruthless enforcer Killian Sinclair forces an impoverished working-class girl, Lily, into a contract marriage. Desperate to pay for her comatose father's medical bills, Lily agrees—unaware her father is the legendary undercover cop framed in a fifteen-year mafia blood feud. But as hitmen strike, Lily’s fiery grit and pure warmth melt the lethal killer’s icy soul. Defying cutthroat family rivals, Killian wages an all-out war to protect his bride, transforming a ruthless blood pact into an epic devotion that crowns Lily the supreme Queen of the underworld.z