The Persona Century Corporation has purchased nearly every parcel of land on earth. Dissension is not tolerated within the corporation's borders and those who oppose Persona are dealt with swiftly. Of those few places not yet under Persona's control is the free town of Kabuki-cho, also known as "The Dark Side of Tokyo". Within the town, under the leadership of a woman named Mai, is a small resistance group called Messiah. Into this world steps a man who takes the sobriquet of Kabuki-cho: Darkside. Sealed up in another dimension eighteen years ago by Persona Century, Darkside now returns to aid Messiah using his unique mystic power of renewal.

An innocent young man, Ikuroo, has a parasite known as Baoh implanted in his brain by an evil organization, Doress. The parasite makes him nearly immortal and gives him the ability to transform into a really powerful beastie when he's in trouble. Doress intends to use him in some sort of ploy for financial success, world domination, or something along those lines, but when they're transporting him on a train, a young psychic girl, Sumire (who's being held by the organization due to her abilities), sets him free and the two escape together. Of course, Dr. Kasuminome is the mad scientist behind the whole Baoh thing, and he isn't about to let his test subject get away and he has considerable resources (including some superpowered lackeys, as well as a small army) at his disposal.

A freak accident unleashes a demonic spirit within researcher John Stalker - transforming him into Saldo, a mythical cyber-beast fueled by hate and evil.

Chen Xing is the young master of the Chen family in Dongyang City. Both his parents died. He could have succeeded him as the head of the family when he came of age, but was plotted and plotted by the ambitious acting head of the family, Chen Sheng, to occupy the magpie nest. Who would have thought that Chen Xing would survive the catastrophe, accidentally obtain the long-lost supreme skill "The Ancient Star God Art", and learn some of the moves, come back strong, expose Chen Sheng's ugly face, and imprison him. The matter was put aside for the time being. Chen Xing took precautions and carefully studied the "Ancient Star God Technique" to collect the star beasts needed for the technique and grow rapidly. During this period, Chen Xing rescued Mu Qinglan, the daughter of the palace lord of Xuanyang Palace, because of a star beast, and on her advice, she went through all kinds of hardships to enter Xuanyang Palace. However, as soon as he started, Chen Xing had constant disputes with Jian Feikong, the son of the deputy sect leader.