A writer becomes obsessed with his girlfriend's former boyfriend, now a very successful novelist. To discover if the ex-boyfriend still has feeling for his old love, the writer joins the novelist's group therapy meetings.一位作家迷恋上了女友的前男友，后者现在是一位非常成功的小说家。为了探究前男友是否对旧爱仍有感觉，作家参加了小说家的小组治疗会议。
“江湖女骗子”白娜（章若楠 饰）与“小镇憨憨男”方耀东（吴昱翰 饰）在船上不打不相识，谁料冤家路窄白娜阴差阳错竟被当成方耀东媳妇，受到方家人的热情款待。而方耀东为了戳穿白娜谎言、赢回家人信任，与白娜斗智斗勇惹出笑料不断，家庭保卫战一触即发，“女骗子”与“男憨憨”高手过招会如何相爱相杀？
