On the night of her 4th wedding anniversary, Susan Ireland (Myrna Loy) discovers her hubby Steve (William Powell) has been out carousing with an old flame. She files for divorce, but the cunning Steve feigns insanity in order to postpone the proceedings and convince her she's got it all wrong. The plan almost works, but the trickery is turned when Susan has him committed to an asylum. It's nonstop fun as Steve tries to escape and win back her love - and he literally has to go nuts to do it!