Medical student Jiang Youxi runs into He Zhuo late at night, accidentally bumping into a side of him unknown to others. Jiang Xu, a boy who time-traveled, immediately claims him as his biological father and carelessly damages a precious item, running up a huge debt. With nowhere to turn, He Zhuo proposes a compromise: let her come often to take care of the Alaskan Malamute at home. Little do others know, He Zhuo, who has suffered from insomnia for years, can only fall asleep peacefully when he smells the faint, sweet fragrance on Jiang Youxi. The sensible boy constantly mediates their interactions, and He Zhuo, with his cold and rigid exterior, slowly lets down his guard. From then on, the lonely long nights are accompanied by a sweet fragrance, a unique tenderness left solely for her.