9岁的小女孩蕾蒙娜·昆比（乔伊·金 Joey King 饰）生活在一个幸福美满的家庭里，父亲罗伯特（约翰·考伯特 John Corbett 饰）和善宽容，尽心支撑着这个家；母亲桃乐丝（布丽姬·穆娜 Bridget Moynahan 饰）善良温柔，悉心打理家中的一切；她的姐姐碧祖丝（赛琳娜·戈麦斯 Selena Gomez 饰）美丽聪颖，品学兼优，姐妹俩还有一个牙牙学语的小妹妹。古灵精怪的蕾蒙娜每天尽情玩耍、调皮捣蛋，无忧无虑地享受这份宛如天堂般的快乐时光。然而随着父亲的失业，昆比家的快乐不复存在，人人脸上挂满愁容。蕾蒙娜不愿看到这一切，她决定用自己的奇思妙想为家人们找回久违的快乐…… 本片根据作家碧弗利·柯利瑞（Beverly Cleary）的小说改编。
Ramona Quimby, is a grade-school student with a big imagination. So big, in fact, that she often clashes with her no-nonsense teacher Mrs. Meacham. When Ramona's upbeat dad Robert loses his job, the family - including her teenage sister, Beezus, and their practical-minded mother - must make major adjustments, like dad learning how to run the house. Ramona dreams up various plans to make money so that she can save their house, but because everybody in the family seems too preoccupied to help her with her own worries, she turns to the one person who always has time for her, Aunt Bea. But even Aunt Bea is distracted these days because of her ex-boyfriend - and Quimby family next-door neighbour - Hobart
