One for all and all for one… As children, Sarah, Dorrie, Beth and Caz were inseparable and vowed to one day be each others bridesmaids. But life got complicated. Now they have one last chance to fulfil their promise. Dorrie is planning her ultimate Disney wedding to the delicious Darren and is determined to have her friends back together for the Big Day. But Dorrie's fairytale is not all that it seems… Beth is desperate for a baby and is starting to resent her more fertile friends. Is a mistake from her past about to destroy her future? Caz's wild streak has tested her friendships over the years. One by one she has let her friends down, not least when she commits the ultimate betrayal to Susan. Can she change her ways and more to the point, does she really want to? Married to Steve, Sarah is plagued by doubts that she went down the wrong path. Does Sarah have the strength to make a change and will she ever be able to forgive Caz? As Dorrie's big day dawns, all eyes are on whether the ultimate act of friendship will be honoured and obeyed…