Mangryang, the greatest assassin of the Heavenly Demon Cult, left the Jianghu behind to become the owner of a small inn. One day, while quietly living by selling noodles, a crazy bald monk from Mount Songshan dumps a newborn baby on him and disappears... "Just look after her for a month." Sowol suddenly finds himself taking care of a child, something he never expected in his life. But something is strange. "Daddy, look at this!" "...Lili? How did you do that?" The child... is a genius?