Diane is recently widowed after 40 years of marriage. Vivian enjoys her men with no strings attached. Sharon is still working through a decades-old divorce. Carolís marriage is in a slump after 35 years. Four lifelong friendsí lives are turned upside down to hilarious ends when their book club tackles the infamous Fifty Shades of Grey. From discovering new romance to rekindling old flames, they inspire each other to make their next chapter the best chapter.