In early 1997, mobsters Kwai Ching-hung, Yip Kwok-foon and Cheuk Tze-keung, whom have never met one another, are all in Hong Kong. Thereafter, rumour has it that Hong Kong's three most notorious mobsters, known in the underworld as the "Three Kings of Thieves", are plotting together to score a final hit before the transfer of sovereignty of Hong Kong. However, none are initially aware of the rumour. Yip is living as a fugitive after a gunfight with the Royal Hong Kong Police. He now makes his fortunes by smuggling counterfeit electronics. Powerful and prestigious in the past, Yip must now grovel to high Chinese officials. Although successful in his business, he becomes depressed. When the rumour comes to him, he feels the urge to give up everything and pick up his gun once again to join forces with the others. Kwai is very cautious and uses several pseudonyms to hide his identity. Although the scale of his crimes is nowhere as large as Yip's and Cheuk's, but he has managed to commit repeated robberies that are totally unknown to the police. Small-scale robberies, which have become his expertise, have minimal risk but also little profit. As he hears of the rumour, he realizes that he will make a large fortune by collaborating with Yip and Cheuk. He initially restrains himself and chooses to ignore it. However, Cheuk begins to have second thoughts. Cheuk has recently abducted the son of a rich tycoon and successfully extorted a ransom, all while under police surveillance. Wanting to raise the bar for himself, he hears about the rumour and becomes obsessed with the idea, going to extreme lengths to seek out Yip and Kwai.