Na A Jeong, a struggling actress stuck playing extras, agrees to pose as her longtime friend Lee Do Han’s wife to appease his chaebol family. While preparing for her "role," Do Han's younger brother Ji Han, determined to secure his brother as the LJ Group's heir, throws a wrench in their plan. Ji Han introduces Yun Chae Won as Do Han's potential bride, sparking unexpected chaos. As secrets, ambitions, and fake relationships collide, A Jeong finds herself at the center of a dramatic and unpredictable family saga.