No one expects much from Christy Brown, a boy with cerebral palsy born into a working-class Irish family. Though Christy is a spastic quadriplegic and essentially paralyzed, a miraculous event occurs when, at the age of 5, he demonstrates control of his left foot by using chalk to scrawl a word on the floor. With the help of his steely mother — and no shortage of grit and determination — Christy overcomes his infirmity to become a painter, poet and author.

Three young Dubliners go to London in search of fun, fortune and, in the case of 17-year-old Mary Kelly, an abortion. Homeless and jobless, their adventures quickly turn sour.