After her family is destroyed and everyone she loves is killed, Shen Zhiwei enters the imperial palace alone. She seeks neither the emperor's favor nor involvement in the harem's vicious struggle for his affection. Instead, she endures humiliation and lies low while secretly searching for clues about an old case. Caught between the competing forces within the palace, she proceeds with utmost caution, protecting herself while gathering evidence. She swears to uncover the shocking conspiracy hidden deep within the palace behind the wrongful conviction of years past.