A Very Dangerous Doctor explores one of the longest-running, most emotionally charged battles in British medical history. In one corner, a pioneering doctor who dared to accuse mothers of abusing their own children. In the other corner are the mothers who counter-claim that the doctor was the abuser; using his power so that he could research on the children to test his own medical theories. With unprecedented access to both sides of the story, this authored documentary, by Bafta award-winning film-maker Leo Regan, explores the controversy surrounding paediatrician Dr David Southall and a group of mothers, who he accused of abusing their children. Filmed over two years, Regan gets to the heart of the war between doctors and mothers and tries to find out who is telling the truth.