Jean and Maria are upset into their everyday life by the arrival of 3 maintenance technicians at their home. Nothing more common. But Jean is suspicious. Much to the dismay of his wife, he takes them in his sight. A war of nerves begins. 三個電訊維修員照往例到府服務，好不容易進屋之後，沒想到迎接他們的竟是一把長槍！
