Saiyuki is about four companions who go westward to conquer evil brewing in India. The bad guys in the west are trying to resurrect one of the worst demons there ever was. Later on they shift their focus to three gods who are plotting to rebel against the Heavens.
Sanzo becomes depressed in the constant rain so Goku tries to cheer him up. But it is no use as Sanzo gets more irritated and throws thorny words at Goku.
Goku finally comes back to himself and jumps on Homura. This increases Goku's power due to his rage. Homura takes off the chains from his hands and releases his true powers. Homura's strength is devastating and Goku's comrades want to ehlp him but his says he wants to defeat the god by himself.
Goku wants to see Nataku and sneaks into the Great Palace. He meets Kenren, the Commander General of the Army of Celestial Heavens. Kenren, who is the previous existance of Sha Gojyo, is surprised to see Goku chained with weights on both hands and legs.
Goku was born 500 years agon in the Celestial Heavens froma stone and brought to the Goddess of Mercy - Kanzeon Bosatsu. Goku meets a boy called Nataku who is the Lord of War and is th eonly person in the Celestial Heavens who is allowed to kill. He receives an order so subjugate the great monster, Bull Satan.
Sanzo's party arrives in a town called Saika on the day of Festival of god. The god they worship here is Shien. Lilin learns that Shien and two other gods took the Hallowed Sutra from Gyokumen-Koshu.
Zeon hears that One of the Sutras of World Commencement was found in a villageso he visits the village to find out if it is true. Meanwhile in a neighboring village our heroes hear a rumor of a monster devouring human's spirits.
God Homura and his two fellow gods are ready to being the Creation of New World bu they need Sanzo's Sutra of Dark Power to accomplish their plan. Homura tells Sanzo to bestow the Sutra by the next morning but Sanzo has nfo intention to give it out. Our heroes will have a hard battle against the gods.
The creation of New World of Homura, Shien and Zeon has begun and Sanzo and his comrades go to the Tower of Konran where Homura's party is supposed to wait for them. Instead our heroes are attacked by the force of monsters lead by Gairu. More enemies are waiting.
Goku resists the attack of Homura's Royal Guards single handedly so that his comrades can go into the Tower to find Homura. The enemy uses an artifice called Work fo Repentance forcing a person to remember the old wounds in the heart. Goku is stunned when he sees his mother in law crying in front of him.
500 years ago in Celestial Heavens, Konzen takes Goku to Tenpoh, grand central of the entire force of Celestial Heavens. Nataku receives a new order of subjugation from Li-Tohten again but his wounds hav enot healed yet. General Kenren want sto take his order but he gets refused and punished to his indecent behavior.
Sanzo's party and Kogaiji's group finally confront Homura, Shien and Zeon. Sanzo wants to take back his Sutra of Dark Power and Kogaiji has to get the Hallowed Sutra. When the battle begins, Shien releases his true power over to our hereos and Kogaiji's group.
Zeon also releases his true power and this combined power of two gods overwhelms everybody in the battle field. Sanzo is ambused by Goku, who is still controlled by the Work of Repentance, and attacks anyone in his way.
Our heroes meet the paraty of the bogus Sanzo again. Then the party of bogus heroes remembers their pride as the best impostors of the world and devise a plot to revenge the true heroes.
Five skilled warriors of the Celestial Heavens pop up in front of our heroes again as they want to take the Sutra of Dark Power from Sanzo and force Son Goku to come to their side.
Sanzo and his comrades get lost in the deep woods and have to sleep in the open. Sha-Gojyo does not like this idea and keeps on walking to find a way out. He finds a cave and realizes he is now lost.
The Celestial army destroys the monster warriors and soliders in Castle Houto. Kogaiji and his followers are surprised but then realize the three self professed Gods are his father, Gyumao-Bull Satan.
Sanzo and his party walk into a village where Cho-Hakkai grew up in an orphanage. He meets Sister Shaohei who spent her childhood in the same orphanage.
While our heroes are struggling in a snow storm, they meet a young monster, Shoryu, who manipulates snow, ice and water skillfully. Sanzo and three warriors are made a fool of by Shoryu's attack which is empowered by an evil forbidden spell.
Our heroes encounter new enemies from the heavens that are not human or monsters. They call themselves "Gods" and one of them is after Sanzo's Sutra of Dark Power.
Abandoning the Celestial Heavens to build a new world, they choose the tower and castle made by Monster King Gailu and his warriors as their headquarters. The army of Celestial Heavens led by three self professed Gods begin to attackk to size the tower.
A platoon of 5 skilled warriors wants to join the army of the Celestial Heavens and comes to see Prince Homura. Prince Homura orders t hem to destroy Sanzo's party and get the magic sutra.
The Iron Demon Troop assaults Sanzo and his comrades but is completely destroyed by our heroes' power. Rashu, the leader of the troop survives, and sets a trap to capture Sanzo and Goku.
Our heroes walk into a desolate village and wonder what has happened here. Four coffins of equal size to our heroes appear along with a creature called The Undertaker.
Sha-Gojyo remembers what happened to him 3 years ago; hat he helped a man named Chogo-Noh that was lying on the roadside. Sanzo is ordered by the Trinity Gods to arrest the man who has killed many monsters and thi man is Chogo-Noh.
Sanzo and his comrades run into an old friend of Sah Gojyo and Hakkai named Tonpoo. Tonpoo tells them tha he volunteereda milita called Fanron Troop tha is assembled of only human beings that hunt down evil monsters.
Sha Gojyo meets a girl at a mall and she asks him to kill a monster which had killed her parents. Sah Gojyo is lead to the monster's hideout but it is too late for him to realize it was a trap to induce him.
Sanzo and his comrades are stunned to find numerous stoned monsters in a town called Tofu-Gai. Just as Goku, Sha-Gojyo and Cho Hakkai arrived they turn into stone statues as well since they are monsters as well.
Five Sutras possessed by Sanzo and his comrades are needed for reviving Gyumao the Bull Satan. Kogaiji, the son of Bull Satan, crosses the desert and meets our heroes. Kogaiji challenges Sanzo to be duel but Sanzo has been weakended by scorpion poison.
Our heroes venture into the desert and fall into quck sand. It is a trap set up by the desert monster who believes he will get eternal life if he eats a priest of great virtue.
Goku takes out his read ring but his senses of judgment has gone. He can not recognize his friends or enemies. So he attacks whoever he catches in his sight.
Goku and Sha Gojyo enter a village in search of food and encounter a young monterh named Yan-Min. Yan-Min's husband is a human looking monster so the villagers despise her for having a monster's baby.
Lilin, the young sisters of Kogaiji challenges our heroes. Her trick does not work on our heroes but instead works on 3 stupid monsters. Lilin defeats them and they become her followers.
Our heroes come to a Village that is having a ceremony that offers a sacrifice to the evil monster rulling the folks. Hakkai is stunned by the girl of sacrifice as she ooks like his late girl friend, Kanan.
Our heroes hear a rumor of a savior who destroys evil spirts and monsters who is called Rick-Do. Rick-Do is actually a fortuneteller that is possessed by a fetish talisman.
Sha Gojyo is surprised to hear of a monster named the same as his missing brother-in-law, Gee-Yen. The townspeople tell them t hat the monster that attacked the humans in the forest looked like Gee-Yen.
When Sanzo is severely injured, the head ring of Goku's head ring comes off and this controls the balance of his magic. Goku loses control and becomes delirious.
When Sha Gojyo talks to Hakkai, a puppet controlled by Chi Is-So attacks him. Sha Gojyo is injected with the seed from a blood sucking plant but the seed cannot be removed as it's too close to his heart.
Sanzo and his comrades arrive in a village where the townsfolks believe the story that their village was saved by the priest Sanzo. A false party of Sanzo appears and our heroes are mistaken for imposters.
The quartet visit a huge temple where all the priests live a strict life of no drinking, smoking or tangible things. Sanzo partakes of the forbidden sins. Evil assassins attack the temple.
Our heroes visit a temple where they grow a strange shape of fruit. Sanzo senses something is wrong with the temple and they decide to leave but before they can leave Goku slips into a nightmare.
A long time ago there existed a place called Paradise where humans and evil spirits coexisted in harmony. Then one day a negative spiritual wave spread over this world and the evil spirits and monsters became violent and started attacking humans.
Goku meets a wounded girl named Ho-May whose friend was killed by one of the evil creatures. Goku can not tell her he is one in disguise. Our hereos are ambushed by spider-women disguised as traveling entertainers.