With a rich and tumultuous history spanning 500 years, the Lan Empire has seen its fair share of triumphs and setbacks. Lynx can trace her lineage back to the influential House of Joo, which played a significant role in the empire's establishment. Despite her prestigious background, however, Lynx was left to grow up in poverty in one of the empire's slums after being abandoned at birth.
Now, Lynx's fate hangs in the balance as she faces the prospect of being sold into servitude as a concubine to a wealthy senior citizen. But everything changes when a noblewoman named Heeyun Joo suddenly emerges. Heeyun's uncanny resemblance to Lynx is startling, and she instantly claims to be Lynx's long-lost twin sister who vanished almost two decades before.
With Heeyun's life in danger, time is of the essence. Urged on by the desperate need to protect her newfound sibling, Lynx must take on Heeyun's identity and play a high-stakes game of deception if she hopes to keep them both safe.