Red Leopard is the ace squad of the special forces. During an anti-drug operation at the border, they encounter a counterattack by transnational drug traffickers and the captain dies. After the Red Leopard members are successively discharged from the army, Jiang Zhi goes undercover in the drug dealing kingdom, determined to avenge their captain. Meanwhile, Ke Bei and his comrades open a military training base, living a stable life. However, a threatening video concerning Jiang Zhi's survival once again fills him with righteous indignation, spurring him to fight to the very end with the overseas gang.

特种兵柯北复员后，和战友齐圣合伙开了一个军事拓展训练营。这一天，突然收到一份特殊的快递，里面藏着战友蒋智的半截手指。一段事关蒋智生死的视频，显示卧底东南亚某国的黑帮的蒋智身份暴露，遭到昔日执行任务时结下的仇家的残害。面对战友的生死，柯北无法再坐视不管。于是昔日的战友们重新聚首，孤军深入异国他乡，为战友，更为祖国，与犯罪分子血战到底。