why didn't they ask evans?

When bobby jones goes to retrieve his wayward golf ball at the bottom of a cliff, he little expects that he will find a dying man there. With his last breath the man gasps, "why didn't they ask evans?" looking for a handkerchief in the man's pocket bobby pulls out a photograph of an attractive young woman. Intrigued by the question and the photograph bobby and his vivacious friend frankie derwent set out to solve the mystery-putting their own lives in great danger along the way.