Gallant groom David has just three weeks and £12,000 to organise a wedding for bride-to-be Kelly. As a young girl Kelly always dreamed of being a dancer, but her dreams were cut short by illness. So Kelly just wants a small intimate wedding with a few friends and family where, for a day, she can forget about her condition. But David wants a day with Kelly at the very centre of attention to celebrate the passion she had to give up, with a huge dance flashmob wedding in the middle of a shopping centre in front of hundreds of people.