Christmas is coming to Chipping Chedar, and once again Mr Operatski is putting together the cast of dancers for the annual musical. Angelina mouse is desperate to play the lead role in "Cinderella Mouse and the Ugly Whiskers". But what's this? Mr Operatski has given Priscilla the plum role instead. And what's more, Angelina has been saddled with the part of Wicked Stepmouse! Sensitive Angelina isn't one to hold her temper and she complains loudly about the casting to all and sundry. But the foolish girl lets her temper get the better of her and she quickly finds herself dismissed from the production altogether. Miss Lilly helpfully steps into to Angelina's shoes, but she in turn is unintentionally injured by the girl during a winter toboggan race and that puts the entire school production in jeopardy. What on earth is to be done? Will Angelina learn some humility and rectify her wrongdoings, or will she become the outcast of the school? What ever happens, the show must go on!