The Qing makes a contentious demand, and Yi In's decision in the matter forces Hee-soo to carry out her own plan — but last-minute complications arise.

As Jong-hwan gets close to catching the faux-princess, Hee-soo puts her faith in Yi In — struggling with her growing feelings for him.

After lightning ignites a fire, Yi In sees it as a sign from above. As Queen Oh's health falters, Hee-soo strives to protect the Grand Prince's fate.