Hollis Shaw's life is turned upside-down when her heart-surgeon husband Matthew is killed in a car accident following a heated argument and the cracks in Hollis's perfect life - her strained marriage and her complicated relationship with her daughter - grow deeper. So when Hollis hears about something called a 'Five-Star Weekend' - one woman organises a trip for her best friend from each phase of her life: her teenage years her 20s her 30s and midlife - she decides to host her own Five-Star Weekend on Nantucket. But the weekend doesn't turn out to be a joyful Hallmark movie. Hollis and her friends' choices bring up old loves terse friendships a career on the line and collapsing marriages. And then there's Gigi a stranger to everyone (including Hollis) who reached out to her through her blog. Gigi embodies an unusual grace and as it happens has many secrets . . .