A princess born to the Jade Emperor and the King of the Underworld has everything except good health, and after dying young time and time again, she is known as a VIP of the River of the Dead. One day, she hears the tragic story of a young princess she meets there and secretly takes her place in the human world. But the kingdom the girl was sent to is full of danger, with enemies trying to kill not only the princess but also her husband, the crown prince. Unable to ignore the innocent people being targeted, she decides to step in and protect them herself.