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Twenty years ago, three formidable police officers, known as the "Trident," were a force to be reckoned with, earning great respect in the police force. Now nearing retirement, they unexpectedly stumble upon a major money laundering case, freezing a massive amount of illicit funds. To unfreeze the assets, a notorious financial fraudster hires criminals who resort to extreme measures. The "Trident" finds themselves facing old enemies from two decades ago and challenged by various powerful forces. Confronting new types of crime, they rely on traditional policing methods. As the criminals attempt to tempt them with enormous bribes, the bond between the three begins to strain. However, in the face of their duty as police officers, they unite to take down the financial crime syndicate and bring the corrupt mastermind behind it to justice....