After the bloody battle against Hades, the goddess Athena and her saints are still recovering when they find themselves face to face with their newest and most formidable foe: the dreadful moon goddess Artemis. Artemis replaces Athena as the earth guardian deity and takes over the Sanctuary, turning Athena's Saints into her servants. Upon invading the Sanctuary, the Bronze Saints learn that Athena was banished by Artemis and decide to fight the moon goddess in order to rescue their true goddess and free the Earth from Artemis's ominous control.

The plot involves the coming of Lucifer to the Sanctuary, where his underlings systematically dispose of the surviving Gold Saints. Athena goes to Lucifer to ask for peace, placing herself in peril. The Bronze Saints must then come to her rescue, destroying Lucifer's Fallen Angels (Seima Tenshi in Japanese) in the process.

Athena receives the visit of Phoebus Abel, her older brother and God of the Corona. He informs her that he has come to destroy humanity as punishment for their corruption, just as it was done in ancient times. He dismisses Seiya and the Bronze Saints, as she will now be guarded by Abel's three Corona Saints, Atlas of Carina, Jaow of Lynx and Berenike of Coma Berenices, and the five resurrected Gold Saints who died in the Sanctuary battle: Saga of Gemini, Deathmask of Cancer, Shura of Capricorn, Camus of Aquarius and Aphrodite of Pisces. When Athena rebels against Abel's plan, he attacks her, sending her soul to Elysion, the final resting place from which there is no return. The Bronze Saints immediately rush to the Sanctuary to save her and ultimately overcome Abel.

In Siberia, Hyōga saves a man that is being attacked. Injured, the man manages only to say something about Asgard. Some days later, Saori, Seiya, Shiryū and Shun are wondering about Hyōga and decide to go to Asgard to investigate. At Valhalla, the Lord of Asgard, Dolbar, says he has not heard of any Hyōga and neither has his right hand, Loki. However, at all times Seiya and the others can feel an evil cosmo emanating from Loki and the other Odin Saints called God Warriors. Shiryū, in particular, notices a familiar cosmo coming from Midgard, a mysterious, masked God Warrior. Dolbar makes it clear that he is trying to take control of both Asgard and the Sanctuary, imprisoning Athena in a strange dimension within the giant statue of Odin. Midgard reveals himself as Hyōga and tries to kill Shiryū to prove himself to Dolbar. Thus, it is the task of the Bronze Saints to defeat Dolbar, Loki and the rest of the God Warriors, to save Athena and Hyōga.

When Seiya, Hyōga and Shun visit Saori (Athena) at the orphanage, they meet an employee called Eri. An orphan herself, Eri takes a liking to Hyōga and one night they sit outside watching the stars. They see a shooting star and Hyōga asks Eri to make a wish. After Hyōga leaves, however, Eri becomes powerfully attracted to the shooting star and wanders alone into the woods, where she finds a golden apple. She is then possessed by Eris, the Goddess of Discord, and kidnaps Athena, planning to use the golden apple to suck her energy out, fully reincarnate and take over the world. Eris leaves a message for the Bronze Saints, who set out for the goddess's temple which appears on the mountains. There, the heroes fight the five Ghost Saints: Maya of Sagitta, Orpheus of Lyra, Christ of the Southern Cross, Jan of Scutum (called by the Japanese name Tateza) and Jäger of Orion.

Ages ago, the goddess Athena was served by fighters called Saints who channeled the power of the Cosmos within them. Now a youth named Seiya has trained to become a Saint himself by earning the mystical Cloth of Pegasus. He is joined by other Saints with Cloths of their own to fight for Athena.

Machine Robo: Revenge of Cronos, also known as Revenge of the Gobots, is a Japanese anime television series produced by Ashi Productions. It ran on TV Tokyo from July 3, 1986 through May 28, 1987. A large portion of the Machine Robo toy-line was exported and sold by Tonka in America as Gobots and Rock Lords. To date, only 15 episodes of the series have officially been released with English subtitles on three DVDs by Central Park Media.