Two local detectives, following up a small but odd burglary of leases at an estate agent's office, discover the body and take on the investigation of the death.

They track down and arrest a suspect described by several persons as the man who occupied the house, but the case takes an unexpected turn when he admits that he was a door-to-door salesman who was with the victim but denies any involvement in her murder.

After the dead woman is positively identified, the veteran inspector leading the case has to tell the parents, then develops a "wild idea" about the identity of another suspect, and orders a standard procedure that confirms his theory in a non-standard fashion.

This suspect (Tenby) admits knowledge of the death but his contention that it was accidental appears to be unshakeable until the detectives realise that he has lied about a crucial detail: claiming to have bought something on a Monday bank holiday.

"[4] The Monthly Film Bulletin wrote: "An undeniably entertaining story-teller, Val Guest has an efficient if facile talent which is ideally suited to this kind of mechanical whodunit.

The meticulous yet fascinating business of police detection, allied to well-used and sharply photographed Brighton locations, holds the interest and provides a few macabre shocks; though the constant dovetailing of scenes, by the use of a noise or gesture linking one shot to the next, is apt to become tiresome.

Set in Brighton, director Val Guest adopts an unsensational, pseudo-documentary approach that concentrates on the often laborious details of police procedure as the identity of dead woman is ascertained and her killer is slowly unmasked.