Paul is on vacation at Grandpa's place in the countryside. Grandpa is great - the countryside, not so much: no internet, no cinema, and Grandpa doesn’t even have a car! But then the two of them discover a red folding bike in the ditch. Together, they fix up the bike: the tires need to be patched, the chain needs oiling, and of course, a bike also needs functioning brakes and a bell - and Paul needs a helmet. Finally, they’re off, and Paul and Grandpa set out on their way to the lake, going uphill and downhill. Not even a flat tire can stop them! In this heartwarming and witty picture book, children learn everything important about bicycles and cycling.