Tony Leung and Fennie Yuen are having a teary-eyed breakup; he's tangled with some gangsters and must flee Hong Kong for Vietnam, and even though they're engaged she doesn't think she can wait for him. As they talk, a massive riot rages behind them; Molotov cocktails fly all over the place as police and protesters attack each other. (It's the late 1960s in Hong Kong, a politically turbulent time.)