两名来自佩皮尼昂司法警察局、谈不上多么出色的警员，抵达小镇圣玛丽欧米讷，监督当地宝石市场展会的活动。在调查一桩看似微不足道的事情时，他们意外地撞上了一个可能规模更大的犯罪网络。

在外甥的要求下，一位专门调查婚外情的私家侦探发现自己准备调查胞弟可疑的死因，尽管他俩早已断绝关系。他前往胞弟在法国和西班牙边境的豪宅，那里聚集了许多嫌疑人：一位心灰意冷的美国寡妇、一位前海军陆战队的直升机飞行员、带着地方口音的摩托帮成员、追踪失踪吉普赛人的无能警察。

At her grandmother's house, with her daughter, Lucie dreams of being an actress.

Thomas and Francis kidnap Wilfrid, the owner of a carwash. Surprisingly, he is delighted with being kidnapped, this company that imposes itself on him comes to brighten his own lonely life.