Lin Tongyue, the illegitimate daughter of a marquis's household, is pressured by her adoptive mother into an arranged marriage. In despair, she accidentally enters a strange dream and forms an inexplicable bond with a handsome, aloof man of otherworldly elegance. After waking, a strikingly handsome young gentleman named Ling Yuan comes to propose marriage, looking exactly like the man from her dream. The two live together in loving harmony for three blissful, peaceful years. Until one day, an immortal in white suddenly appears, claiming that he is the very man from her dream and that their earthly connection remains unbroken. Thus begins a fateful romance spanning the realms of immortals and mortals.