David (Bob Monkhouse) and Brian (Ronnie Stevens) are recently graduated dentists from the King Alfred's Dental College, where according to the dean they are rotten molars' and hopeless. So when they are offered a job endorsing a new, but less than savoury toothpaste 'Dreem' they think their luck is in. Little do they know that by signing the contract they will be stuck off the Dentist register forever. When they realise have been duped by the 'Dreem' team they set out to make a fantastic new toothpaste of their own. But to save their dental careers, with the help of 'Dreem' girl Jill (Shirley Eaton), they'll have to get past 'up to no good' company executive Macreedy before they make a mint!