Sophia, eldest daughter of the Morretti family, was drugged by her stepmother, fed hormones to make her obese, and sent to a stranger's bed. After a wild night, she left a one-cent coin and walked away. A year later, Sophia has transformed into a top-tier assassin. Returning for revenge, she enters a contract marriage with Victor, mafia family head, only to discover he is the very man from that night. Meanwhile, Victor has spent the entire year searching for the owner of that one-cent coin.
