Thuong Nguyet Hoi (My Nhan Non-Lan) is a film that tells the story of the Lac family, robbed by gangsters for possessing a mysterious phoenix chi. This family has been destroyed and only Lac Khe Van is left, a girl infected with fetal poison. Eight years later, Le Khe Van became the most famous civilian surveyor in Cang Nguyet City. She relies on selling maps and surveying cartography for a living. She was severely poisoned and had only three months to live. Before she dies, she wants to avenge her brother by killing Jiang Chaoxi. At this time, Kien Gia Street, which was the only place that brought her warmth, was about to be destroyed due to the city development planning. In order to protect the home of ancestors and villagers, Lac Khe Van put all her talents to come up with a new planning map, then she approached Giang Trieu Hi, becoming his client. By chance, she discovers that her unconscious brother is being hidden in the mansion. She also discovers a surprising secret of Trieu Hi.