Esumi's character Tamami is the "bull doctor" of the show's title, which comes from the word "bulldozer." Ignoring any opposition from the people around her, she uses any means necessary to determine the truth behind the deaths of the bodies she examines. Because of her personality, she is constantly at odds with both Ishihara and Inagaki's characters.
Investigations on a mysterious woman Toko started when Sonoe, a teacher and Toko's fellow faculty member, was found dead as a result of what seemed to be an unfortunate accident. Eiki, an insurance investigator, and Takeshi, an ambitious police detective, find links between this case and the deaths of Toko's 3 fiances, and are determined to uncover the truth.