After the addition of Mars to Glory, the maritime mission begins a new journey! Jiang Xiaoyu, who was promoted from lieutenant to major, led Lu Yan, Zhang Chong, Balang and other backbones of the Dragon Shark Squadron to continue the unfinished legacy of Long Baichuan and Liu Xiaoshan and dig deep into the dust-laden ultimate secret of the 303 submarine - this "ghost submarine" not only hides stolen national treasures, but also carries the core secrets of South China Sea defense during World War II. The mystery of its unmanned drifting and complete channel data affect the covetousness of many forces.
Zhao Ziwu returned to the team with honor after completing five years of undercover work in the pirate organization, and became the sharp knife of the team with his top sniper skills; Li Junjie, a technological wizard, brought the results of the X capsule to the rank of major and formed a research team to empower combat power with intelligent equipment. Wuhan Steel was promoted to the battalion commander of Tiger Battalion, and comrades such as Shen Ge and Wu Yun worked side by side on the intelligence and aviation battlefields. In the iron-blooded military camp, the deep love between comrades and the love between sons and daughters were intertwined.
From deep-sea diving to recover cultural relics to passing the rigorous selection process of the Blue Whale Special Forces, the Dragon Shark Commando has grown up all the way. The Mars International Scout Competition is coming again. They face the conspiracies and extreme challenges of transnational forces, use Eastern tactics to defeat powerful enemies and defend the glory of the Chinese military. Unsolved mysteries such as Xiang Yu's retirement destination, the ultimate ownership of Submarine 303, and Long Baichuan's past will also be revealed one by one during this journey across sea and land.
From individual assault to submarine coordination, from offshore defense to ocean escort, the Dragon Shark Commando guards the blue land with iron will, interprets the oath of "an army within the army, steel within steel" with youthful blood, fully demonstrating the hard-core strength of the Chinese Navy and its responsibility as a great power.
