Shy thirteen-year-old Bree must channel her inner anime heroine to solve a crime at the Anime Expo.

Bree Wong and her best friend Alix are so excited to be at the anime fan convention. They're dressed as the lead characters from their favorite anime series. Bree cosplays as Red Squirrel the redheaded detective and can't wait to meet Midori the Japanese voice actor for the character. But before she gets the chance it's announced that Midori's signing event has been cancelled.

Bree is devastated. So when she overhears that a valuable original print of Red Squirrel belonging to Midori has been stolen she decides to investigate and catch the thief. Maybe Bree can get a face-to-face with Midori if she recovers the stolen print. The only problem is the culprit was seen wearing a cosplay costume. Not just any costume but one of the most popular characters at the convention. Bree must channel Red Squirrel and get to the bottom of this or lose her chance to meet her idol. What a tough nut to crack!