Cheng Chumo, once a shiftless young man, transforms his life after falling for Fu Rou, a diligent merchant's daughter. To win her heart, Chumo dedicates himself to studying and eventually decides to serve his country by leading a campaign against coastal pirates. Meanwhile, Fu Rou becomes a court-weaving official through a series of events, complicating their secret meetings. As she uncovers dark secrets and a dangerous plot, Fu Rou and Chumo must use their wits and skills to overcome their challenges together.