Fang Qi , an alchemist living with the modern world ,travels through space to a demon-ruling land due to an alchemical accident.He decides to make demons into pills .However , when he wakes up , he finds that he is married to a demon named Bai Yuying .After a series of unspeakable events , the demon suddenly grows up. Bai Yuying is not as weak and small as rumors say at all -Everything about him is big !!