Angel. Carmen. Doreen. Jade. Talented Memphis girls who had a brush with pop music fame - guided by Carmen's warm-hearted mother. But when she was elbowed out for a bigger manager, Carmen walked too. The bitter breakup shattered the Diamonds' never-easy "sisterhood" - and cost them the big-time. Now a reunion offers a fresh start, just as mid-life struggles are pushing all four to the brink. As the women contend with the new and overwhelming demands of celebrity, they find that the old traps have stayed the same. Can they ever reach true sisterhood - and help each other become the sparkling gems they were meant to be?