At sixteen years old, Irene 'Reenie' Calder is leaving school with little in the way of qualifications. She is delighted to land a seasonal job at Mackintosh's Quality Street factory. Reenie feels like a kid let loose in a sweet shop, but trouble seems to follow her around and it isn't long before she falls foul of the strict rules. Diana Moore runs the Toffee Penny line and has worked hard to secure her position. Beautiful and smart, the other girls in the factor are in awe of her, 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 supply of Quality Street at risk, Reenie has a chance to prove herself. The shops are full of Quality Street lovers who have saved up all year for their must-have Christmas treat. Reenie and Diana know that everything rests on them, if they are to give everyone a Christmas to remember.