She, a monster princess devoted to the well being of her people, loathes humans and couldn't care less for those lowly creatures' mundane lives. He, a young Taoist swordsman whose sole existence hinges on his hatred for monsters, is determined to wipe out all monsters that cross his path. However, this pair of archenemies is now living under the same roof as master and apprentice...?!!! When will this precarious balance be disturbed? And when the time comes, will they fight each other to death?
