本片改编自已故爱尔兰天才作家兼画家克里斯蒂•布朗的自传体小说。 　　基提（丹尼尔•戴-刘易斯 Daniel Day-Lewis 饰）天生大脑麻痹身体残疾，只有左脚能灵活如常人。他没有生活自理能力，为家里带来了很大的负担，幼时总是遭到周围孩子的嘲弄，父亲险些放弃他，而母亲（布兰达•弗里克 Brenda Fricker 饰）却一直对他悉心照顾，不离不弃。基提心理苦闷却不能用语言来表达，试图用左脚写字作画，渐渐地凭借毅力和智慧，基提越来越得到认可。母亲悄悄地为基提买了轮椅，之后他又得到了艾莲医生的免费救助。在艾莲的锻炼引导下，基提的身体开始有了好转。此时基提已经爱上了艾莲。某日艾莲将基提的画推荐到了朋友的画廊展出。结束后基提向艾莲表达爱意，却被她拒绝......Christy Brown is a spastic quadriplegic born to a large, poor Irish family. His mother, Mrs Brown, recognizes the intelligence and humanity in the lad everyone else regards as a vegetable. Eventually, Christy matures into a cantankerous writer who uses his only functional limb, his left foot, to write with.