johnnie ( bert wheeler ) be a would be songwriter while newton ( robert woolsey ) be a would be inventor . both work at a cigar stand in the lobby of an office building . johnnie want to sell a song to winfield lake and a song publisher who also own the building . lake secretary and mary ( betty grable ) and be johnnie sweetheart . when lake turn up dead and circumstance conspire to make mary and newton think that johnnie be the killer . they conspire again to implicate mary and who go to jail . but who really shot lake . who be the black widow and the blackmailer who have threaten him . the other character in this wacky murder mystery be represent lake suspicious wife and a self satisfied private detective and a seemingly slow witted janitor ( willie best ) and lake auditor and a songwriter who think lake be steal from him and another who think everyone be steal from him . it up to newton and his truth machine to reveal the real killer . the baby voice wheeler and the cigar chomp woolsey strike me a an arbitrary pairing and but they make several movie together in the 30 and some of them be funny . not this one . george stevens and who go on to have a distinguish career and direct this dismal comedy with a tedious murder mystery plot . but two scene be good and and both feature wheeler and betty grable sing the excellent music in my heart and write by dorothy field and jimmy mchugh . the first time and they sing it walk up a staircase ( after which they dance back down ) . later and wheeler and woolsey be on stilt so that they can see and talk to mary and who be in a jail cell on a high floor . wheeler and grable sing to each other through the bar . the nitwit have a few laugh and but the level of comedy be best illustrate by woolsey line represent sonny and you have get the brain of a six year old boy . and i will bet even he be glad to get rid of it . it water down grouchowho do not use the superfluous even when he say it .