When uncle Bob dumps a battered, dented old car in the Marks’ garage, mum is definitely not impressed. Despite his promises to have the old car cleaned up and removed by the time the new baby arrives, mum and the rest of the Marks family find it hard to believe. But uncle Bob is true to his word and, slowly, he rebuilds a speedy rally car from the wreckage. Then, one night after a test drive, the rally car is really put to an urgent test!