A seemingly unexpected military exercise accident tore open the mystery of the transnational spy network. Special forces captain Lu Zhanting witnessed the sacrifice of his comrades in the smoke, but found that there was a cold light of conspiracy hidden in the bullet marks. At the same time, code-breaking expert Su Qingyuan smelled a dangerous smell that had the same origin as the accident from the intercepted code. When the sharp edge of iron and blood meets the sharp edge of wisdom, they are forced to stand in the same trench and pursue the truth in a hail of bullets and a digital maze. From the desolate Gobi to the prosperous city, from the military exercise field to the cross-border border, the enemy's trap has long been laid, and every step they take is a quenching road paved with loyalty and life. When the ultimate truth emerges, can they use their sharp edge to cut off the deadly vines entangling their home and country?