Bev, Monica and Roxy are the Three Musketeers of The Sisterhood support group - always together, a gang within the club, inseparable. But new girl Sarah has been welcomed in, and there are signs that the little bunch is about to expand and become a foursome. But when Roxy goes missing, will the new and still-fragile bonds between them be enough to let the newcomer help in the search for her? Where has Roxy vanished to - and why? What's the significance of the stranger who accosted her outside the club last night? Does Sarah know her new friends well enough to help them as the search grows ever more frantic?