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Preface This is a movie about the protagonist Lin Shaolei, who successfully entered college after retiring. After undergoing military training as a freshman, when he was sleeping at home during the holidays, the same voice appeared many times in his dreams, causing Lin Shaolei to open the closet that had been sealed for a long time at home. In order to solve the doubts caused by the dream, Lin Shaolei put on the military uniforms displayed in the closet again, opened the camouflage marks engraved on his body, and began to recall his military career, looking for the answer to why he was a soldier in the first place...