On the very day Lin Shu discovers she is pregnant, she receives the devastating news that her husband, Chen Fengye, a firefighter, has died in the line of duty. While going through his belongings, she discovers his secret crush from 2007. Overwhelmed by grief, Lin Shu unexpectedly returns to the time when she first met Chen Fengye, bringing her child with her. In the millennium-era world of the white-haired boy, she sets out to rewrite their destinies.