Nurse Sarah Keate supervises the third floor of a metropolitan hospital. From the landings of a walnut stairway, unlighted for the sake of economy, she can see everything going on. She generally uses the stairs instead of the lurching cagelike elevator, but one sweltering summer night!

Nurse Sarah Keate, the amateur snoop, is back in stand-up-to-the -devil form. Now she supervises the third floor of a metropolitan hospital. From the landings of a walnut stairway, unlighted for the sake of economy, she can see everything going on. She generally uses the stairs instead of the lurching cagelike elevator, but one sweltering summer night--!