'She had it coming. So had the others.' In 2007, Cora, Faye, Anna and Julia returned home from a week together in Ibiza with secrets to keep.

When they agreed never to contact each other again, all traces of their holiday were erased. Or so they thought. Now, almost seventeen years have passed since that trip and Anna's sister Kim is still picking up the pieces after Anna abruptly abandoned her life to start over in London, the occasional Christmas card her only contact ever since.

Kim has always been sure that Anna's leaving had something to do with Ibiza - she'd never been the same afterwards. And when a photo from the trip surfaces, Kim finally has some clues to start looking into what happened to her sister. Julia, Cora and Faye find themselves forced to come together when they realise someone might be looking into the past.

But how far will they go to bury the truth? And what's to stop one of them from letting a 'friend' take the fall, in order to save herself?