Watch "Palace Heart" episodes 4 online, Download "Palace Heart" episode 4, "Palace Heart" plot introduction.

The plot is set against the backdrop of the Tang Dynasty court, telling the story of the open and hidden struggles within the four rooms preparing the queen's costumes. It reveals the thoughts and schemes of the women in the harem of the Tang Dynasty. The palace maid Liu Sanhao, played by Charmaine Sheh, relies on the "three goods" spirit of "having good intentions, speaking well, and doing good deeds" to rise above the complex harem struggles. She also develops a romantic relationship with Zheng Jiaying, akin to the romance between Dae Jang Geum and Min大人.

Liu Sanhao (played by Charmaine Sheh) and Yao Jinling (played by Yang Yi) are a pair of sworn sisters in the palace. As young palace maids, they are frequently dispatched on errands. At that time, the harem was controlled by four departments: Tan Yanshang (played by Han Mali) in charge of delicious food, Zhong Xuexia (played by Mi Xue) responsible for embroidery and fine clothing, Hu Su'en (played by Annie Wu) managing the furnishings, and Ruan Cuinyun (played by Guan Jueming) overseeing the jewelry. These four vied for power and advancement, leading to constant struggles. Innocent Sanhao and Jinling were even forced to become scapegoats. Despite enduring numerous hardships, Sanhao still adheres to her "three goods" spirit, but Jinling, after being bullied repeatedly, vows revenge. Once, while serving Emperor Li Yi (played by Chen Hao), she secretly seduced him and eventually became Consort Li. She then engaged in a struggle with Consort Xian Wan Baoxian (played by Li Shiyun). Meanwhile, Sanhao, with her clever hands and heart, became the chief palace maid. When both Sanhao and Jinling held power, their sisterly relationship broke down as both were simultaneously attracted to the palace guard Gao Xianyang (played by Zheng Jiaying). Jinling sought to punish the four departments, but Sanhao repaid their grievances with virtue and worked hard to protect the four. Jinling then used this opportunity to persecute Sanhao...