The masterminds behind the scenes attempted to unfreeze billions of assets, not hesitating to hire yakuza forces to launder money by extreme means. Behind everything lies a more intricate and complex criminal network and connections. In the face of the temptation of rivals and difficulties, "Trident" can firmly believe, hand in hand to solve the case, to bring the criminals to justice?

The story of the Northeast Anti-Japanese Allied Forces' rearguard regiment's breakout, reorganization and return to the Northeast battlefield from 1938 to 1945.