Fighting rhinos, stealing priceless artwork and sneaking all the Custard Creams - life is never dull with Grandma Dangerous! As usual, Ollie's Grandma is in a spot of bother. After "accidentally" stealing a priceless piece of art from a Russian museum, she needs to return it pronto. In an astonishing coincidence, she also needs to rescue her friend Beryl from a Russian jail.Can Ollie, Piper and Rose the Ancient Dog of Destiny help get Grandma and Beryl out of trouble? Can they escape "The Politsiya"? And most importantly, will they get home before Mum realises they're not really on a Geography Field Trip for Gifted and Talented Pupils?