The life of a Chinese exchange student in Seattle, USA.

During the Spring and Autumn Period, tyrant from Dynasty Chu tried to seek for the perfect weapon. He ordered more than a hundred blacksmiths to cast it, but all the blacksmiths failed. Feng Huo had no choice but will take refuge in seclusion of the master of sword forging Ou Yezi

Ren Haoming thinks it's Ruan Qingtian's mother who stole his mother's design and then killed his mother. So he asks Ruan Qingtian to be his nanny for one year to repay her mother's debts. He also marries her based on a contract, so as to take more revenge on her. However, during further investigation, he finds that the murderer is someone else. At that time, Ruan Qingtian gets pregnant with his child and prepares to get rid of his imprisonment.