故事发生在1757年的意大利。裁缝皮波（Pippo Popolino）为了吸引寡妇弗兰西斯卡（Francesca Bruni），假扮成了意大利第一剑客，也就是最著名的花花公子卡萨诺瓦（Casanova)。阴差阳错之下，皮波以卡萨诺瓦的身份，接受了一桩报酬丰厚的委托：前往威尼斯勾引美丽的当娜（Donna）小姐，她即将嫁进热内亚最有权势的家族。一连串意外的故事展开了...
Eight years after a cataclysm and disease ravaged the human race - leaving just one in every ten surviving -, all social structures have crumbled like sand castles. Too few still live for anything to have been reconstructed. All remaining animals have been consumed and no sowing has yet been possible. It is Man at his most basic, destitute level. Two groups inhabit the desolate and abandoned land: packs of orphaned children in a feral state, living a nomadic life-style for their safety, and adults (with their offspring), barely surviving any better by living off their meat. It is a war only the most desperate of the two will win.
影片讲述一个在纽约丢了男友(史蒂文斯饰)失了工作的女人(海瑟薇饰)，回到老家后，无意间发现自己和某种怪兽有着诡异的联系。
随着恶魔觉醒，人类世界陷入混乱。性格温柔的男孩与恶魔合体，在神秘好友飞鸟了的指引下，卷入一场残酷、堕落的对抗邪恶之战。