In the late winter when he was sixteen years old, Qi Nan packed up his luggage and went to study in a foreign country alone, and lived in a shared apartment.
The parents of roommate Xu Jingyu once fought side by side on the front line of anti-drugs. A mission took the life of his father, leaving only his mother with a disability, and the pain enveloped the family.
At that time, Qi Nan was lively and cheerful, casually setting the goal of becoming a translator and never seriously envisioning the future; Xu Jingyu had been trapped in the haze of his family for a long time, and was silent and sensitive.
Under the same roof, two teenagers shared their thoughts and were each other's only glimmer of light in the cold winter. They had half-jokingly made a heavy agreement: if they separated in the future, they would meet again either at the airport or in a funeral parlor.
The turmoil in the senior year of high school came. After the quarrel, Qi Nan decisively cut off the bond, and the two separated in the cold winter.
Years passed by, and we met again, in the depth of winter.
Qi Nan, who used to love to laugh, was trapped by long years and trauma, and became seriously ill. He gave up his casual dream of being a translator and became a forensic doctor. Xu Jingyu, who was gloomy and taciturn at the time, finally learned to relax his features and became cheerful and magnanimous.
A serious joke he made when he was a boy turned out to be the secret reason for Qi Nan's career choice - he was prepared that if the worst outcome really came to pass, he would send him off on his last journey.
Concept: Meeting in the winter, they are each other's safe haven