Greed and class discrimination threaten the newly formed symbiotic relationship between the wealthy Park family and the destitute Kim clan.

The door of time opens between the swordsman who wants to seize the legendary divine sword at the end of the Goryeo Dynasty and those who chase after an alien prisoner imprisoned in a human body in 2022.

A pitiless demon becomes powerless after getting entangled with an icy heiress, who may hold the key to his lost abilities -- and his heart.