Manjiro's family believe that his father fell into the river while drunk and suffered a heart attack, but Ryosen Tezuka tells him later that he was attacked by an assassin and died after falling into the cold Kand River. Ryosen Tezuka can only give a rough description of the assailant, but Manjiro asks a yazuka to make inquiries. Following Manjiro's promotion, Ryosen and the western doctors ask Manjiro to press their case for a vaccination clinic...