Feared by the entire city, Marvolo Riddle built his empire with blood, power, and loyalty beside his brothers, Tom Riddle and Mattheo Riddle. But the one thing he treasures most isn’t his empire — it’s his five-year-old daughter, Dahlia. After her mother abandoned her, Dahlia stopped trusting almost everyone, especially women. Every nanny hired by the Riddle family was chased away within hours, leaving Marvolo with no choice but to raise her alone while balancing the dangerous life of a mafia boss. Everything changes during a chance encounter in the city when a tiny white Pomeranian named Fluffy runs straight to Dahlia. The dog’s owner — Y/N — expects anger from the terrifying man standing before her, but instead she witnesses something impossible: Dahlia smiling. And when Dahlia quietly asks, “Daddy… can she be my nanny?” the entire world of the Riddle brothers begins to change. As Y/N is pulled deeper into the dark and powerful Riddle family, she slowly becomes the one person Dahlia trusts, the peace Marvolo never thought he deserved, and the heart of a family built in shadows.