The Steel Saints training facility is stormed by the Pallasites led by Hati. Koga and Subaru arrive soon after and they learn that the residents had previously evacuated with former Bronze Saints Ban and Nachi. While investigating, Koga learns about Subaru's origins from his fellow Steel Saint Erna, and it is revealed that among the Steel Saints, Subaru has the strongest Cosmo, and that one day he may find his own Guardian Constelation and become a proper Saint.

The Bronze Saints rescue civilians who were unaffected by Pallas' curse when Koga has an encounter with a young girl, unaware that she is none other than Pallas herself who has sneaked out of her castle. Meanwhile, Saori's body grows weaker due to her Cosmo being drained as Shiryu, Hyoga, and Shun approach the battlefield.

As Koga and his friends approach Pallas' fortress, Mira appears before them again, but Ikki arrives in the nick of time to protect them. After the Pallasite flees, Ikki reveals to the other Bronze Saints that Pallas is not their greatest enemy, but an even greater foe who is manipulating the whole conflict from the shadows.

Athena, Seiya, Kiki, Fudo, and Harbinger are attacked by their former Gemini Gold Saint ally turned Secondary Pallasite Paradox. Integra, the new Gemini Saint and Paradox's twin sister, arrives to protect Athena and settle their score. Once defeated, Paradox is forgiven by Saori and reforms, just to be later fatally wounded by the Primary Pallasite Gallia.

Subaru awakens as Saturn, the God of Time, the one who bestowed the Pallasites their Chrono Tectors and Holy Swords. Donning his own Chrono Tector, Saturn, accompanied by Europa and Mira, reveals that he had descended to Earth and erased his past memories to live among mankind and determine their worthiness. Having regained his former self, he then declares that humanity no longer deserves to remain on the Earth and uses his powers to freeze all of its inhabitants, before retreating to his heavenly palace with his servants. Determined to make Saturn pay and have ...