Reenie Calder is delighted to land a seasonal job at Mackintosh's Quality Street factory. She feels like a kid let loose in a sweet shop, though it isn't long before Reenie falls foul of the strict rules. Beautiful and smart, Diana Moore runs the Toffee Penny line, but Diana has a dark secret which, if exposed, could cost her not only her job at the factory, but her reputation as well. When a terrible accident puts the country's supply of Quality Street at risk, Reenie has a chance to redeem herself. Christmas just wouldn't be Christmas without a family tin to open and Reenie and the girls know that everything rests on them...