A woman named Maya appears before Hachiya. She was the girlfriend of a man that Hachiya helped sentence to death, and is now asking him to represent her in court.

The job Butterfly Law Offices gets this time is to defend a man named Tsuguji. Tsuguji has killed 15 wizards, and Cecil can't help but have reservations about defending such a person... but knows that it's part of her job and complies.

Cecil gets a job defending an associate from their rival office, Shark Knight. Kujira is accused of using magic to murder someone. Kamakiri, Butterfly's oldest and slowest associate is told to partner with Cecil on this case. Because the two can't seem to work together well, they have a hard time finding evidence to help Kujira.

Because of Cecil's violations of using magic, Butterfly Law Offices keep getting fined. Cecil starts to hate the fact that she can use magic and then Kabutohara tries to cheer her up by inviting her to a cosplay event.

The team at Butterfly head to Boston for a training trip. The training finishes earlier than expected, so Cecil and Natsuna head to Canada to visit Cecil's father with the extra time that they have.

Cecil heads home to Ontario and is reunited with her father, David. They talk about Cecil's mother's trial and Natsuna tells Cecil that she would be willing to help her try to get her mother a retrial.

Once back in Tokyo, Cecil starts to invesigate exactly what happened in the incident six years ago involving her mother. She finds out from Kaede that her getting attacked in Canada has something to do with the incident six years ago.

It comes to light that Shizumu was trying to get his hands on Cecil. Just when Cecil was about to fall into his hands, the one that came to her rescue was Shark Knight's Sameoka. Sameoka and Shizumu's battle of magic is about to begin!

Cecil finally falls into Macal's hands. The ritual to summon Lucifer begins and a huge magic circle appears in the city... What will happen to Cecil?

Makusu offers to confess his crimes, but only if Cecil defend shim at trial. With so many things whirling around, Cecil will have to prove that she can get it done in the stunning conclusion of Wizard Barristers!