Five years ago, assassin Seraphina crossed paths with mafia don Leonardo during a chaotic night in Sicily. Five years later, living in hiding, she raises her twin children alone while running a small clinic. When her children are caught hacking into the mafia’s system, Seraphina is forced into a one-year contract marriage with Leonardo to save them. As she enters the dangerous mafia world, the jealous heiress Victoria sets her sights on the children, forcing Seraphina to reveal her deadly skills and fight back.