In Steel Seventh Company, where everyone is eager to excel, Xu Sanduo is at the bottom of the pack and nobody likes him. It is the care and persistence of his squad leader that spur him to work hard, until he finally becomes one of the best in the group army. Later, his squad leader retires and Steel Seventh Company is disbanded. Having lived through all this, Xu Sanduo matures. He quietly guards an empty company all by himself for half a year, then emerges victorious from a brutal selection process and becomes a member of Old A. During an operation to capture drug traffickers, he accidentally kills one of them. Deeply shaken, Xu Sanduo considers leaving the army. He returns to the home that is the now-defunct Steel Seventh Company and rediscovers his conviction as a soldier. Then he goes back to Old A and begins a new journey...
