As San Francisco's busiest private detective, Mike Shayne can be found at almost any hour, at almost any spot in the city - except perhaps his apartment. However, that's where we find him right now - but he's only there to pickup his overcoat and two theater tickets for his date with Phyllis this evening. But like many plans made, this one will go awry when he receives a visit from Mary Noble, who needs his help on a life or death case...