三对处于各个婚姻阶段的伴侣和一个宅男，七人聚在一起吃晚餐。女主人提议下拍板决定当夜所有人分享每一个电话、每一条短信、邮件的内容,由此许多秘密开始不再是秘密，他们之间的关系也开始发生波动。无数疮痍在这场“坦白局”中被揭开，复杂的男女情感让所有人陷入困局，什么是婚姻感情中最不可触碰的底线？众人遭遇是难言的禁忌还是隐藏的真心，月食过后，谎言能否继续？Seven long-time friends get together for a dinner. When they decide to share with each other the content of every text message, email and phone call they receive, many secrets start to unveil and the equilibrium trembles.
