This hilarious play centres on Lily Piper, a voluble cleaning woman, who keeps telling the cops how to mind their business and who steps forward with the right evidence in every pinch. She lives in the basement of the office building she cleans and one night finds a body. By the time the police arrive, there is no body and no evidence. The wrong alarms are sent out, murdered men turn up alive, and the whole thing is chalked up to the cleaning woman's imagination until an unidentified body is discovered on a distant hill and the cleaning woman uncovers more evidence in the course of her duties. Is the company owner staging his own murder? Or did he kill his wife's lover? Is the lover a firm employee or someone else? Where do the two female assistants fit in? What is the wife withholding?