
In 1966, five infant children were kidnapped by an alien group known as the Alien Hunters for the Reconstructive Experiment Empire Mess, who wanted samples of humans from Earth to experiment on. The children were rescued by Mess' arch enemy, the Flash alien race, which took each one to a different planet of the Flash solar system for training. Each child was trained separately in a range of superpowers that will allow them to fight Mess, their bodies also adapted to the atmosphere of the Flash Solar System making them gain special abilities. When they finally return to Earth in 1986 to combat Mess, who is now trying to invade it, they use the opportunity to search for their birth parents.

Five young people formerly of Earth return to their home-world after 20 years after discovering its invasion by the Reconstructive Experiment Empire Mess.

The Flashman must assert their mission to protect their birth world after Mess creates a creature to turn their genetic creations giant.

Haunted by memories of his abduction, Jin becomes obsessed in stopping an alien hunter who has crash landed on Earth.

After a Beast Warrior makes Dai see everything upside-down, Mag decides to specially train Green Flash to overcome his problem.

Sara and Lou fight on their own in Nagoya against a Beast Warrior making machines come alive.

Jin desperately tries to fix his Flash Hawk when the bikes become key in stopping a Beast Warrior being used by Ley Nefel to cause chaos and destruction.

Facing a Beast Warrior with chameleon-like hiding abilities, Bun devises a unique strategy in order to help the team reveal their enemy.

A Mess plot to trap the Flashman in another dimension is disrupted by an eccentric scientist trying to travel back 20 years to discover the identity of his abducted child!

As the Flashman try to help Dr. Tokimura complete his time machine, Ley Nefel tries to manipulate the situation to gain it's energy source so nothing can stop The Jigen.

Dai's crush on a flower shop worker leads him into a trap as he is manipulated by a disguised Ley Nefel.
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