Accused of a murder he didn't commit, a prosecutor sets out on a mission to clear his name.
High school student Mizushima receives Valentines Day chocolates from the new student, Monami. Little did she know that the chocolates contained traces of Monami's vampire blood. He gets infected from eating them and Monami confesses that she wants to live with him forever as vampires. Meanwhile, Mizushima decides that he wants to fully become a vampire with Monami's help. Keiko, Mizushima's girl friend, sees the two on the school rooftop kissing and in a state of hysteria, attempts to throw Monami off the roof but falls off herself instead. Keiko dies but her father, Kenji Furano, the mad scientist, resurrects her as Franken girl. Thus begins a deadly combat between Franken Keiko and Vampire Monami in the name of love.
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.
Tsukasa got into a severe car accident when she was a high school student. She still suffers from the effects of that accident, with memory impairment and needing to use a wheelchair. Tsukasa falls in love with taxi driver Masaki. Even though they have difficulties, they try to make a happy family together, but they encounter another serious situation.