Radish is afraid of not passing his next maths exam: it is an oral one and he doesn't like to speak in public! In the meantime, cucumbers are disappearing from the allotment owned by Charley's Grandma. The local Council threatens to take over all the allotments ¿ including Dandy's home ¿ to build a car park. Radish discovers that the man behind it all is the Mayor, who used to be Grandma's old assistant in the garden. Radish sees a way of changing the council's decision.