Cattle Hill farm is in crisis, no crops will grow but Albert the Pig, the celebrated inventor, has a revolutionary Nano-seed which can solve the problem. Albert will showcase his seed upon his high-tech laboratory train, however, on the journey his priceless seed is stolen. The thief is amongst them! Clara and Gavin will join forces with the world-famous detective, Agatha Chichester, to unveil the thief and secure Cattle Hill’s future.