Everyone has Halloween but in Yorkshire, they have Mischief Night - for one night of the year, madness and mayhem rule! Tina Crabtree lives on the white side of the park with her three unruly children: Kimberley, Tyler and Macauley. Across the park on the Asian side, is the large Khan family including Immie, his stroppy sister, Sarina and his naughty brother, Asif. As the clock ticks down to Mischief Night, the Crabtree's and the Khan's are unaware that their worlds are about to collide. In the course of one night, the barriers that separate both families come tumbling down in a blaze of crime, clubbing, love and fireworks - changing all their lives forever.