Nothing is going well in Joseph's life. His marriage to Marie is running out of steam: it is obvious that he is no longer attracted to his wife who is in despair. At work, it's not better. Oppressed by a tyrannical boss, Joseph spends his days in front of his computer, alone and jaded, selling labels. The only person who seems to want to bond with him is Jacques, the company computer scientist, a clumsy nerd who is harassed by his colleagues. But one evening, after having received a couple of friends at their home, Joseph suddenly had a severe stomach ache.

Joseph goes to a gold buyer who estimates his turd at ... 30,000 euros.

While shopping, Joseph bumps into his upset friend Sylvie. She suspects her husband Stéphane is having an affair.

Joseph is now sure that his wife is cheating on him with Stéphane but prefers to feign ignorance. The gold buyer turns out to be a thug and begins to take a closer interest in Joseph, who has decided to hide his gold turds rather than sell them to him.

Gilles, Joseph's father, tells him that he used to lay gold in the past too! Joseph immediately understands that his mother was cheating on his father who never suspected anything. Marie begins to suspect Joseph to know about her affair with Stéphane.