Norman is working in a laundrettes when he meets the well known, but aging singing star Vernon Carew who invites him to see his show. When Norman goes to the show he finds a patchy audience that throws abuse at the performer, standing up for him, Norman captures the audience and Carew sees his chance to use his voice to help recapture his fame. Tricking Norman into singing into a tape recorder, he rebuilds his career while Norman still struggles with his inability to sing without accompaniment from his sweetheart Judy.
This film starts badly with an unfunny singing lesson full of mugging and the establishment of a sickly sentimental subplot involving Norman's hopes to help his crippled sweetheart to walk again! However it gets better as it goes despite having to occasionally sink into sentimentality that only serves to take away from the comedy. The routines are quite funny when they come, although Wisdom has done better. One element of the comedy that I felt was ill fitting was the rather crude innuendo and sex-related gags; compared to nowadays it is still very gentle but it just doesn't sit well with the usual gentle humour of Wisdom.
That said it still has some funny scenes where Wisdom shows his ability - if only he didn't feel the need to always add an overly sentimental heart to his films. He does well here but some of that stuff doesn't sit well as it feels even heavier than usual here. The support cast has more famous faces than usual and most of the mare good. The Wisdom regular Desmonde is very good in his role and cameos from John Le Mesurier and Richard Wattis are good if fleeting, however Hattie Jacques is pretty much wasted and her biggest scene isn't very funny at all.
Overall I still enjoyed this film as I am a Wisdom fan, and it did actually get better as it went on. The illogical nature of a plot that sees Wisdom's good but nasal voice saving the career of Carew's much better crooner can be overlooked and in the end there are enough good moments to justify watching the film - just hang in there past a poor start.