Shinichirou's peaceful life is shattered when the villainous Ryugasaki kidnaps Saya and Yuuri to blackmail him into surrendering Arisa, the secret weapon known as Fire Bee. With the help of his grandfather, Shinichirou learns the truth about the electric dolls' origins and encourages Arisa to fight for her friends. Transforming into her powerful combat form, Arisa raids a secret military base and battles the incomplete Fire Dragon to rescue her family.