Recently, many cities have been hit by sandstorms. Armor Hero Flame Dragon Man and Eagle Man receive a new mission to resolve the sandstorm threat and protect the people. During his duel with the enemy Sandstorm Demon King, Flame Dragon Man unfortunately falls into a trap and is instead controlled by the Demon King. As the clash between Flame Dragon Man and Eagle Man is about to erupt, the Armor Heroes must overcome various trials, hold fast to their beliefs, and defeat the Sandstorm Demon King together.