Since the beginning of the world, the wars between two realms of

Tian (天/Heaven) and Diyu (地獄/Hell) has been going on.

 

The son of the divine ruler meets the daughter of the death emperor on earth

during a golden hour when there’s no curse for transforming them into their spirit animals.

The ghosts make a deal with the lovers that if they exchange their crown and sword,

the curse will be broken and peace would return to the two realms.