Everyone has Halloween, but in Yorkshire, they have Mischief Night, where madness and mayhem rule. In the course of one night, the barriers that separate two families—one white, one Asian—come tumbling down in a blaze of crime, clubbing, love and fireworks—changing all their lives forever.

Margaret Hale is a southerner from a country vicarage newly settled in the industrial northern town of Milton. In the shock of her move, she misjudges charismatic cotton mill-owner John Thornton, whose strength of purpose and passion are a match for her own pride and willfulness. When the workers of Milton call a strike, Margaret takes their side, and the two are brought into deeper conflict. As events spiral out of control, Margaret - to her surprise - begins to fall in love with Thornton...