在暗夜中，禁忌的欢愉如烟火般绽放，惊心动魄，欲罢不能。四房播播四房播播

　　Three young couples are renovating together a loft in Paris. During a barbecue, Patrick and Julie confess to their friends that they practice partner-swapping. That information shock 1 of the couple, but the other one seems to be interested..