The plot introduces us to a psychologist who suggests to three couples that they engage in a group session, where they will have to analyse each other without her being present. In order to do so, she has left them a number of envelopes containing instructions on the things they have to address. The method she has proposed encourages everyone to share their opinions, argue with each other and reveal their true selves. They are all public prosecutors and defence lawyers; they all interrogate one another, confess, lay themselves bare emotionally, regret the things they have said and toy with provoking the others. It’s a comedy with realistic characters and with a great sense of humour up until the final twist, which will wipe the smile off the audience’s faces because, in an instant, everything will take on a different meaning.

　　水手屍體被沖上岸，現場無人證也沒有死者漁船的蹤跡，李奧警探負責追查兇手，但漁村裏沒有人願意談論這件事，使調查陷入困境，直到出現令人意外的關鍵證據。

　　一名神秘的連續殺人犯，讓城市裡的富裕階層備感害怕，犯人殺害藝術收藏家後，會利用他們的屍體重現哥雅知名畫作中的場景。卡門是一位經驗老到的調查員，但對自己的人生感到厭煩，伊娃則是她身邊的年輕助手。兩人要從沒有留下線索的犯案現場，找出這個心思縝密的殺手。