The film is set in Hong Kong before its handover to China in 1997, when the city’s booming economy inadvertently attracts three infamous criminals from Mainland China to cross the border and make their fortune in Hong Kong. Although unknown to one another, their notoriety has bred the rumor that the triumvirate will join forces to stage a shocking heist together, so much so that the criminals themselves get wind of it and are tempted to do just that.

A restaurant employee wanted for murder contracts Ebola by raping a woman in South Africa and starts an outbreak there and in Hong Kong when he returns home.