In the winter of 1975, Yao Yaoxuan, a model educated youth on Beidahuang Farm, had a second identity that no one knew about - an intelligence executor code-named "Cold Blade".
When an out-of-control weapon fight forces him to reveal his extraordinary skills, the mysterious female doctor Zhang Keqing arrives with a special mission. Is it an organizational test or a hostile trap?
In the cold era, every step is an abyss, and every choice has a price.
