A young girl is sold into the red-light district Yoshiwara and is put under the care of the oiran (lead prostitute) of the Tamakiku house. The girl is rebellious, but the more experienced people in the household begin to think that she will be one day a great oiran, since an oiran needs not only beauty and talent, but she should also have the tenacity to maintain the position.

Based primarily on the first game in the series, Phoenix Wright: Ace Attorney, the film focuses on rookie defense attorney Ryūichi Naruhodō, as he strives to protect his clients in various murder trials, including the death of his mentor, Chihiro Ayasato, and the accusation of rival prosecutor, Reiji Mitsurugi. Ryūichi's greatest ally is Chihiro's younger sister Mayoi, a spirit medium whose body is posessed by Chihiro to communicate with him. The film will be a courtroom drama combined with the video game series' signature style. Sci-fi elements are also used such as characters bringing up holographic images of evidence during trials.