某天，久不谋面的老同学相约聚会。聚会在教师文伯（田雨 饰）及其妻子戴戴（代乐乐 饰）的家中举行。小人物吴小江（乔杉 饰）和老婆李楠（霍思燕 饰）、女强人韩笑（马丽 饰）、不出名的编剧贾迪（佟大为 饰）及其新结交的富家女友娇娇（奚梦瑶 饰）相继到来。身为心理医生的戴戴的一番话，让李楠对老公吴小江看手机时鬼鬼祟祟的行为起了疑。之后在众人的提议下，他们决定玩一个游戏：所有人都把手机放在餐桌中央，期间无论哪部手机接到的微信、短信还是电话都必须当众宣读或接听。 光鲜靓丽的外表之下，每个人都有着不想被他人知道的秘密。却仅仅以为一部手机，让各自真实的面目大白天下……
Florinda Bolkan plays the daughter of a prominant English politician who keeps having recurring nightmares in which she makes love to a bisexual nympho who lives downstairs and conducts all-night LSD orgies. When the nocturnal wet dreams become murderous, the neighbor turns up dead, and Florinda is the main suspect. Did she actually commit the murder she dreamt about Is she being framed by her philandering husband Did Florinda actually make nightly visits downstairs aside from borrowing the occasional cup of sugar How DID Florinda's letter opener end up stuck in the dead neighbor's chest anyway The complex plot unfolds amidst red herrings, outlandish dream sequences, lesbian hanky panky, and ominous close-ups of Florinda Bolkan's guilt-ridden facial expressions every time someone mentions the murder. All this takes place in swinging late-1960's London.