Born under mysterious circumstances, Grey, Pocket , Roots, Dew, Nuts and Titch are not your ordinary squirrels. Using a tourist map and led by the charismatic Grey, the teenage squirrels embark on a breathtakingly hilarious adventure as they make their way from London's Greenwich Park to Hyde Park to meet the Wise Owl. But the squirrels are not alone. As time ticks and darkness beckons, they are being stalked by the dangerous Rat King and his vicious sewer army. What is the secret of their origins? What did the Wise Owl tell them? And, most importantly, will they make it back to Greenwich Park in time to save their families?