On an island off the coast of Ireland, guests gather to celebrate two people joining their lives together as one. The groom: handsome and charming, a rising television star. The bride: smart and ambitious, a magazine publisher. The cell phone service may be spotty and the waves may be rough, but every detail has been expertly planned and will be expertly executed. But as the champagne is popped and the festivities get underway, resentments and petty jealousies begin to mingle with the reminiscences and well wishes. The groomsmen begin the drinking game from their school days. The bridesmaid not-so-accidentally ruins her dress. The bride’s oldest (male) friend gives an uncomfortably caring toast. And then someone turns up dead. Who didn’t wish the happy couple well? And, perhaps more importantly, why?