The Thirteenth Reunion (E02)

Ruth, a reporter, is assigned by her editor to participate in the ten-weeks course of a new weight-loss organization called "Think Thin". According to a letter from a reader, the course is very masochistic and depressing, destroying the self-esteem of the patient. Ruth makes a friend in the course, who dies in a car crash. In her investigation, Ruth finds dark and macabre secrets. (Prime Video)