At least one in five people in France suffer from a mental health condition. The issue has been named a priority for the government in 2025, which hopes to tackle a wide range of conditions, from mild symptoms to severe and chronic illnesses. Every day, psychiatric emergency departments in hospitals treat patients in distress, while operating in increasingly difficult conditions. To find out more, we spent time with the Ville-Evrard psychiatric unit of the Delafontaine Hospital in Saint-Denis, north of Paris.