Assassin Shayna Sterling (Crimson Fox) returns to reclaim her mother's property from her stepmother. She enters a contractual marriage with Huo Ting, tasked by Old Master Hawthorne to rein him in. She uses her skills to settle scores with the Su family, dismantle her stepmother's kidnapping plot, and reveals her assassin identity. Their marriage evolves to mutual affection; they take charge of the family business and bring wrongdoers to justice.
