By the hand of the Dark Fleet Black Hole, the five warriors Ryuuseijin escaped to Earth after their home planet Marina was destroyed. They fight to protect their second homeland, Earth, from the evil clutches of Black Hole!! The legendary giant robot Chronoskyzer sleeps in an ancient ruin, and the Ryuuseijin head towards it. Meanwhile, Shark General and Dr. Octopus of Black Hole set their sights on the platinum juice secreted by female Marinans, targeting Blue and Pink for the main attraction at an auction held for the galaxy's wealthy.
