Hugo and Betsy live an ordinary life with their mum and dad. Despite being six-year-old twins, they are as different as chalk and cheese. Betsy is outgoing and loves attention, whereas her brother is serious and quiet. That is, until he comes across a rather strange and interesting black crow, Seamus O'Croake ... and discovers he can talk to him. Seamus and his clan face dreadful problems. Members of the local council are threatening to destroy...