In the summer of 1998, five children made an agreement on the threshing floor of Huaishuping: They would join the army together and no one would be left behind. Sixteen years later, he is the sharp knife of the special forces, and they are each other's only family. On the last mission, the five of them walked into the jungle, and he was the only one who came out. Those who survived lived for them and avenged them. From a child in Huaishuping to a lone wolf in the jungle, a story about promise, loss and redemption.
