Kōga arrives to the Palaestra, guided by Bear Geki and his disciple Sōma. There he is greeted by Saint apprentices, who first approach him with hostility. Also, Kōga meets Aquila Yuna, the young female Saint, who teaches him about his constellation and about the code that guides Saint women.

Resuming their journey, the Bronze Saints eventually are tracked down by a small cadre of Martians. Running away from them to protect Aria, the teenagers reach a small but lively city, where Yuna fails to purchase a ship ticket as her purse fell during their escape. In order to rise money for ship fare, the Saints eventually find a job thanks to a kind old man who takes them to his wife's restaurant, where the youngsters prove they are not up to the challenge, much to the woman's chagrin. Later, the Martians are able to find the Saints and a fierce battle ensues. After achieving victory, the young Saints receive a resounding ovation from the crowd, and are given another chance at the restaurant.

The young Bronze Saints decide to invade Mars' stronghold to rescue Aria. The teenagers carry out their plan, finding strong opposition in the enemy lines. During a moment of desperate need, the Bronze Saints receive the assistance of Lionet Sōma, who rejoins them, stronger than before, thanks to further training under Unicorn Jabu, the Bronze Saint. The Saints reach Aria's chambers, only to find she has left. Not all is lost, as Sōma is able to retrieve the Southern Cross Cloth's Clothstone, which belonged to his father Kazuma, after defeating Hornet Sonia, his killer.

Souma and Sonia are entrapped in an illusion of their past when Souma's father Southern Cross Kazuma was alive. Sonia is revealed to have been ordered by Medea to kill the Silver Saint for he was an open leader against the Martians. Hesitant on her mission she departs and faces Kazuma, as Souma also witnesses the past event. Sonia is first easily pushed away by Kazuma who tells her that her fists are made to protect those she care for, but when she thinks of her family, Sonia bursts into a rage and stabs Kazuma from the back. It is revealed then that after the murder,...

The episode is just a summary of all the events that have happened thus far from Koga's birth to Aria's death at the hands of Mar's

After the defeat of Kouga at the hands of Harbinger, the remaining Bronze Saints engage him in battle, meeting with utter defeat. Harbinger reminisces about his difficult childhood and what drove him to a life of violence, to become the strongest and eventually a Gold Saint. Managing to recover after witnessing the defeat of his comrades, Kouga attacks Harbinger with a single blow imbued with all the power of his Cosmo. Much to his surprise, Harbinger emerges unscathed and his comrades have vanished.

After leaving Eden, Mycenae returns to guard his House, where Haruto and Souma arrive promptly. The young Saints find themselves to fight their way through the House of Leo, but the ferocious Mycenae proves to be an almost impossible foe to overcome, even when the two teenagers fight him together and neutralize his King's Roar technique. When he unleash his King's Emblem, Haruto risks his life by stopping Mycenae's final attack. Souma retaliates with a Lionet Bomber powerful enough to crack one of the shoulder pads on his Gold Cloth. The fierce determination of the ...

Kouga and Yuna reach the House of Capricorn where they meet Ionia and learn from him his reasons for betraying Athena. Kouga attacks the former Headmaster of the Palaestra, but is once again immobilized by his Domination Language technique, and his Darkness Cosmo is brought out. Before Yuna is able to help Kouga keep the Darkness Cosmo at bay, Ionia buries her in a rubble of books, facing Kouga alone. However, after succeeding to repress the Darkness Cosmo in his heart, Kouga awakens his Seventh Sense and finally kills Ionia with the legendary Pegasus Comet Punch.

Yuna, the only one left standing after Abzu's terrifying onslaught against Kouga's friends, is encouraged by Athena to fight against Abzu in order to bring Kouga back. However, all her attempts fails, gaining her darkness wounds for each attempt. Just then, the fragments of Aria's staff combined with Kouga's friend's Cosmos awaken Seiya, who has been trapped in the depths of the red planet all this time, waiting for a chance to stop Abzu's plans. The Gold Saint confronts Abzu and manages to drive him from Kouga's body with aid from Yuna. The God of Darkness then flees...

Koga and Subaru are sent by Shina to investigate the disappearance of a Silver Saint. Upon finding their missing companion, they are approached by the Secondary Pallasite Europa and the Tertiary Pallasite Thebe and learn, much to their surprise that Eden is now working with them as a Tertiary Pallasite, with the promise of having Aria and the rest of his family revived. With orders to kill Koga, Eden attacks him mercilessly until Thebe decides to intervene and the Orion Saint reveals his true intentions as well as his new Orion Cloth.

Once the saints infiltrate the city, Seiya draws the attention of the enemy allowing Koga and the others to push forward. However, Tarvos appears to challenge Koga to a decisive battle and Ryuhou stays behind to assist him.

Koga and his friends keep traveling in order to find Kiki and fix their Cloths, as only Eden and Subaru can clear a path for the others. They rendezvous with Shaina and Aries Kiki who repairs their Cloths while explaining to each of them what they must focus on the most while fighting. However, Dione appears, and while the legendary Steel Saints Shou, Daichi and Ushio buy some time fending of the Pallasites with the other Saints, Kiki soon arrives to deal with the Secondary Pallasite himself, before Koga and his friends, with reinforced and fixed Cloths, head off ...

Ikki fights Aegaeon while Koga, Souma, Yuna, and Shun keep moving onward. During the battle, Ikki and Aegaeon sustain grievous wounds. Meanwhile, the Gold Saints discuss Harbinger's loyalty to Athena since she gave the Athena Cloth to him for safekeeping, telling the Gold Saint that Athena trusts him. At the same time, Titan tries to calm down Pallas as she snaps after a Quaternary Pallasite informs her of Ikki fighting Aegaeon. At the end of the battle, Ikki sacrifices himself to completely defeat Aegaeon and all his fellow Bronze and Gold Saints grieve over his ...

The Bronze Saints investigate what they believe to be the final resting place of Shiryu, Kiki, and Fudou, who sacrificed themselves to defeat Hyperion, but they discover that while the Tenchi Destruction Slash has been destroyed, Hyperion has survived with barely a scratch. Koga and his friends must use their new Omega Cloths to take down Hyperion for good. During the battle, Subaru's great and powerful Cosmo once again surfaces to everyone's surprise, along with the proclamation that he is a god. However, after seemingly defeating Hyperion, a strange voice talks to ...

After a long and vicious battle, Kouga and his friends convince Saturn to recognize the value of mankind as he regains his lost memories from when he fought by their side as Subaru. The God of Time then takes his leave and while the efforts to rebuild the Sanctuary and Pallasvelda begin, Kouga and Eden embark on a journey together to find their own place in the world as a new era unfolds.