When they first met in a bamboo forest in the south of the Yangtze River, the royal orphan Jiang Ziran and Su Zhenzhu decided to get married as children, and they woven a bamboo bracelet as an alliance. After his biological mother died of illness, Jiang Ziran changed his name to Xiao Yu and entered the palace. Through the intrigues, he transformed into a cold and stern prince. He spent ten years obsessed with finding his old acquaintance.
Su Zhenzhu's family was in decline, and he depended on his younger brother and forgot about the past. Xiao Yu pretends to be a traveling doctor and meets again. As their love grows, a struggle for imperial power breaks out, and political enemies threaten her. In order to protect her, Xiao Yu was forced to massacre the village but accidentally killed his younger brother. The old love turned into a blood feud.
She is imprisoned in the imperial palace, deep in the palace, her enemies are also her guardians, and her concubine is also her obsession. The bamboo rope is not broken, love and hate are entangled. What kind of ending will be written in this sadomasochism that started from innocence and became trapped in power and conspiracy?