The story takes place during the Anti-Japanese War. The iron hooves of the Japanese raged in the Central Plains. The ancient Chinese nation is facing the crisis of extinction. Ten miles in the sea, dragons and tigers, Shanghai beaches, many forces are intertwined, and the dark tide is raging. Gao Tianxing (played by Liu Enyou), a young man with special skills, has a patriotic heart, and wants to contribute his own strength with meager power. As an assassin, he assassinated a member of the Japanese parliament and met Ren Hailong and his assassin gang. Tian Xing and Hailong's son Ren Zhi (played by He Minghan) sympathize with each other. Later, they became brothers with different surnames and wandered about. They have become the thorn in the eyes of the Japanese and the puppet regime. At the same time, the skill and sincerity of the two young people also attracted the attention of Jiang Pan (Lü Yi), the head of the CCP secret group. Jiangpan is the home of two people, and it is the righteousness of the country. However, it seems that this is a fork in the road, and the two good brothers are gradually drifting away on different roads.