Swallow was a simple Chinese girl, but was innocent in love with a man who led her to Canton and a life of drugs and prostitution. She could no longer take it any more, so she killed him. Having escaped to Hong Kong, Swallow was forced back into prostitution. Troubles with the police resulted in her being used as an informer and things really got dangerous. Teamed with a policewoman partner, Rainbow, they were identified by a drug lord. He had them sent to Canada and framed up with innocent, so they decided to be fugitives. Swallow and Rainbow began by acting as prostitutes and then robbing their clients to earn their living. Later they discovered that they had been framed by a bribed police officer and his partner, they drug. They vowed to seek revenge. Swallow and Rainbow smashed their way to vengeance and fought for their justice.