新兵小弟入伍后被分到军营，与左铺的城哥成了朝夕相处的战友。严苛训练、雨中操练、紧急集合与病痛照顾中，两人从陌生到默契，雪夜岗亭里相拥取暖，军中绿花的歌声里心生悸动。 harsh discipline and budding affection test their bond in the barracks.