King, a trafficked lion cub, escapes from the airport in mid-transit and finds shelter in the home of Inès and Alex, 12 and 15. The siblings come up with a crazy scheme: to bring King back to Africa. Unfortunately, the customs agents on their tail don't make their mission easier. But soon, Max, the kooky grandfather they've only met twice before, joins their adventure... and from then on, the sky's the limit.

　　经济拮据的萨米（贾梅德·布兹 饰）和老婆艾莉丝（爱丽丝·贝莱迪 饰）生活在老旧社区，为了迎接即将出生的宝宝，萨米只好在一家高级百货工作，赚取稳定薪水。在一个打混摸鱼的上班日里，亿万富翁菲利普艾蒂安（丹尼尔奥图　饰）的独生子──亚历山大（西蒙·法留 饰），在随扈的簇拥下来 到萨米的面前，劈头就命令萨米当他的“生日玩具”，心不甘情不愿的萨米虽然觉得莫名其妙，却无法拒绝高薪的诱惑。然而随着萨米越来越深入富豪的生活，他不仅发现了一些不可告人的秘密，而原本应该八竿子都打不着关系的这两个家庭，也迎来天翻地覆的变化……