The O'Rooneys are a family of field mice who live happily in an old biscuit tin, in a place they know as the Wilderness. Here they are free to play, safe from harm.Or so they think.Pugnacious the cat is on the prowl and has the youngest mouse, Rooney O'Rooney, in his sights!Join Rooney on his adventure as he searches for his lost family. Can Avortit, the wisest creature in the Wilderness, and his friends help Rooney find his way home?