In Japan there is a sinister threat lurking inside the Toraidento Corporation called the Lotus Clan. Led by their mastermind Kurosawa Orochi, the clan intend to rule Japan and then the world. But one man opposes them, Professor Naku Toshiro. With the help of a young man with an extraordinary gift, Kosuke Ryu, and the Professor's amazing machine, RISNG SUN; can the Professor stop the Lotus from world domination?
The Lotus Clan has unleashed the most deadliest machine on the citizens of Tenshi City, Japan. Can Kosuke Ryu and RISING SUN stop the rampage of DIAYAMO?!