Based on true events Little Secret is a film with three interlocked stories all connected by a single secret that converge to reveal the tragic yet beautiful lives of three families and how hope, dreams and destiny can unite people from very different parts of the world. Adopted at childhood by a loving family after facing the loss of her parents, Kat led a life full of adventures. Now in her teenage years she is trying to fit into a "normal" life, as the world shows her how cruel living can be. After discovering a secret which threatens her life, she wonders if her dreams are still possible. Heloisa is a dedicated mother who has been entrusted with the secret and will do everything to keep her family together; however, she knows that the future is unpredictable. Jeanne, a beautiful young Amazonian native, falls in love with Robert, a New Zealander, with whom he discovers that her possibilities are infinite, however she forgets that destiny has plans of its own. Barbara, an older ...

为了保住外婆的花园，十岁的亚瑟（弗莱迪·海默 Freddie Highmore 饰）必须找到外公失踪前留下的财宝。按照外公留下的提示，亚瑟终于找到了每年只打开一次的月光之门，进入了迷你墨王国，见到了外公笔记里的美丽的塞琳娜公主和迷你墨人，从他们口中得知四年前外公为了寻找宝藏走入了禁忌城，而统治那里的是“邪恶的M”。在与闯入的敌人战斗时亚瑟从石头里拔出了力量之剑，成为了迷你墨王国的英雄。神剑拔出，迷你墨王国的英雄们必须前往奈克罗鲍利——禁忌城打败“邪恶的M”。亚瑟、塞琳娜公主、王子倍塔克服重重困难终于抵达了M的老巢，传说中的恶魔玛塔扎德就住在这里……
　　本片是吕克·贝松的第十部电影，传说是他的“收山之作”，历时七年的筹备制作过程，投资达6500万欧元，是法国电影制作史上最昂贵的作品。