To fight an evil organization the United Nations has formed Sun Rangers, a team of three brave warriors.

The 4th film in the Heroine In Danger Omnibus tokusatsu series. Yui Kuwana is a school teacher who fights against evil as Leona. One day, Leona finds her student nearly getting hit by a vehicle. She saves Tsuyoshi but Traffic Monster named Hazardeor appears and tries to kidnap him.

Leona rescues a mysterious girl, Flea, who escapes from the pursuit of the demon king Garunte. The next day, Flea transforms herself as Mika, a transfer student, but is attacked by Hysteria, a PTA demon under Garnte’s command, when she realizes her true identity. While Leona bided her time, Mika (Flare) escaped the difficulty with the help of Sanpei. Garnte, who really wants to get his hands on Flea, lends his strength to Hysteria to resurrect the demons who were defeated by Leona in the past! Leona is facing eight demons at the same time, a formidable foe even if only one is present. She succeeds in getting Flea and Sanpei away, but they are beaten to perfection and taken away! The demons are trying to find out the whereabouts of Flea, carrying past grudges and blaming her! How is Leona’s fate?

Leona died in the fight with Pain and Gain. Her soul was captured in the prison called Soul Prison. It is graveyard of genies who were defeated by Leona. Genies think that Leona’s death is the best chance to revenge her.

Yui Yawana is a teacher of Urushigaoka Elementary School. She transforms into Fighter of the Sun Leona to fight evil.