Lin Wei, a girl from the countryside, grew up carrying the pain of being unloved and having to rely on others. Yet through sheer perseverance, she got into the chemistry department at Jinghua University. During military training, she fainted from exhaustion and was rescued by Wei Ran, the sunny campus heartthrob from her department. That was how their story began. Wei Ran's gentle care and steadfast pursuit helped Lin Wei overcome her deep-seated insecurities. Despite interference from Qin Lan, the campus belle, and the gulf between their backgrounds, they spent a romantic college life together. After graduation, they joined the same pharmaceutical company. Just as happiness seemed within reach, Wei Ran's family forced them apart over their difference in social standing, and Wei Ran was compelled to leave for the United States. Lin Wei turned her sorrow into motivation and focused on developing new drugs, rejecting the heartfelt confession of her alumnus Li Ze in the process. Three years later, after overcoming many trials and persuading his family, Wei Ran returned with a promise to take Lin Wei to see the northern lights. Together, they overcame every obstacle and vowed to spend their lives together beneath the aurora, continuing a heartwarming love story that began in youth and would last until they were old and gray.