Danshichi mistakenly had a chugen (a person in low rank) belonging to a villain named Sagaemon OTORI, die to save Isonojo, the son of Hyodayu TAMASHIMA who was a vassal of the Hamada family in Senshu and his benefactor, from danger and went to prison.
団七は恩人である泉州浜田家家臣玉島兵太夫の息子磯之丞の危難を救うため、悪人大鳥佐賀右衛門の中間を誤って死なせてしまい入牢する。