Coco is the shyest little mouse on Comet Island. But when his only friend Ben is captured by an owl and the island is invaded by a gang of crows, Coco must conquer his fears to rescue them both. Hatching a plan to fly to Scotland to recruit the help of a legendary golden eagle, Coco invents the Flynut - an aircraft fuelled by magical anti-gravitational skynuts. He and his intrepid team - Francesca the mouse, Batty the bat, Froggy the frog and Shimmer the flightless firefly and her forty nephews and nieces - set off on a rescue mission, crossing Scotland from Aberdeen to the Isle of Skye via Loch Ness and meeting a host of colourful characters along the way. Will Coco overcome his shyness to lead his band of merry animals? And will his fearless gang save Comet Island and rescue Ben before it's too late?