Based on the play 'A Marriage Made in Saloon' by Crazy Mohan 'Poikkal Kuthirai' is an hilarious depiction of how Sambandam (Vaali) who has the habit of placing bet for each and every small things and winning it and Indu (Ramakrishnan) enter into a bet inside a saloon owned by Muthu (Ravindar). The bet is that Indu will win Sambadam's daughter Janaki's (Viji) heart and marry her. If Muthu is successful in his mission Sambandam will shave half portion of his mustache for their marriage, and if he fails shave Muthu will shave head. Finally who wins the bet is what the films narrative is.