On the Mekong River in the Golden Triangle, at a section of the river known as the "Gate of Hell", two merchant ships from China were attacked by gunfire from unidentified persons. Not long after, the Thai military held a press conference, accusing the Chinese merchant ships of drug trafficking. Although the press conference claimed that all the crew members had fled, the bodies of thirteen Chinese crew members who had been brutally killed were soon discovered. This daring case shocked the Chinese police. Gao Gang (played by Zhang Hanyu), the captain of the Yunnan Provincial Anti-Drug Brigade, was ordered to take a special operations team to Thailand and cooperate with intelligence officer Fang Xinwu (played by Peng Yuyan). According to existing information, this case was committed by Nuo Ka, a drug lord entrenched in the Golden Triangle. Nuo Ka is greedy, cruel, and daring. He is a cancer that disturbs transportation safety in the Mekong River Basin. In order to bring this villain to justice, China, Laos, and Myanmar carried out a joint patrol of the three countries to focus on sweeping Nuo Ka's drug manufacturing dens. Gao Gang and his companions also went deep into the most dangerous situation and engaged in a fierce battle with drug traffickers who had lost their humanity... This film is adapted from real events.