Den Giftige Tvivl (The Poisonous Doubt) is a podcast series about a rumor that is circulating at the Panum Institute (headquarters of the Faculty of Health and Medical Sciences at the University of Copenhagen).

Four doctors who worked on dissecting bodies in the basement have developed cancer at a very young age. The bodies contain formaldehyde, a toxic and carcinogenic gas. Christian is one of those who have fallen ill. He now wants to know if there is a link between the cancer and his work with the bodies, or if it is merely a coincidence. His search for answers takes him from the basement in Copenhagen to chemical lobbyists in Brussels.