Stefan, a middle-aged businessman, is looking for a partner for an illegal but very profitable business. To this end, he finds a certain Rysiu, an unemployed man who spends most of his day at a beer stand. There is a rumor that Rysiu has a stomach of steel. Stefan subjects his potential partner to harsh and merciless tests. After they are completed, he reveals the details of the deal of a lifetime. He wants to smuggle diamonds to Berlin in Rysiu's stomach.