May (Anita Lee) is a prostitute with both a sick mother (Helena Law) and son to look after. After being raped and accidentally killed by a group of construction workers (William Ho, Peter Chan Lung, Kwai Chung and James Ha), her ghostly self takes over the phone lines to execute revenge. All while her neighbour, cop Ma (Lau Ching-Wan) worries about his own romantic exploits and now the well being of May's mother and son.