Private detective Mac Greg is approached by an influential and wealthy person with a request to find her missing daughter, who has not made her presence known for quite some time. Trying to find her, the detective constantly gets into all sorts of troubles and alterations. More than once he finds himself on the “edge” - between life and death... And the denouement comes literally on the last pages and turns out to be very unexpected. The plot and style of presentation of the novel are somewhat reminiscent of detective stories by D.H. Chase.