Yoon Jin-yi, a palace lady from the Joseon Dynasty, lived her life believing that the King was the only man in the world. On the first day of guarding the King's bedchamber as a Jamil Nain (a type of palace maid), she awakens to a secret desire hidden deep within her heart.

However, in this world, freedom and love are luxuries for a palace lady. To make matters worse, she is falsely accused of treason and, while fleeing, falls into a pond, facing a crisis of death.

“I don't want to die like this!”

Responding to Jin-yi's earnest wish, the mysterious pond led her to… 21st-century South Korea!

A woman who has never experienced love finally faces love in a reality where her suppressed emotions and desires are liberated.