Plotwise this is a rather silly little whodunnit masquerading as a period drama/biopic.
However the only reason I wanted to see it in the first place was because I was curious about what the great Henry Fonda was really like at his peak. I wasn't disappointed - he produces a truly warm and charismatic performance.
In addition I can honestly say that I was never really bored at any stage during the film, so a strong ***1/2 Out of *****