Shoshidai, an organization tasked with collecting cursed weaponry, dispatches two of its agents to retrieve the legendary Demon Sword Zsoltgewinn.

An abandoned baby boy is adopted and named Gai by swordsmith Amon. He becomes an apprentice, later losing his arm in a ritual gone horribly wrong.

After acquiring the Azoth Sword, Miki is ambushed by Marcus and Miura. Amon forges a prosthetic arm out of the sword Shiryu to replace Gai's lost limb.

With his soul possessed by a demonic spear, Tatsumi transforms into a monstrous entity called a Busoma. Miki takes Marcus to Shoshidai headquarters.

The Shoshidai reawaken their most powerful Chrysalis, Seiya Ichijo. After Gai's powers partially awaken, his mind reverts to that of an infant.

Ichijo attempts to test Gai's potential as a Chrysalis but is interrupted by a member of the Gabi, a group that has long fought Busoma.

With Gai in tow, Ichijo heads to Shoshidai headquarters before stopping to meet his lover, Kei. A mysterious sword appears before gamer Midoriko.

A wealthy widow hires a search vessel to find the lost treasure of pirate Throlla, who reportedly also kept a mythical weapon known as Gallon's Hammer.

Miki and Marcus are sent on a covert mission by the Shoshidai to infiltrate and retrieve an ancient weapon of the fairy world: the legendary Halbert.

A depressed Sayaka questions Amon about Gai's motives. Meanwhile, Ichijo reveals to Gai how he came to harness the power of the Chakram.

After Gai is safely brought to Shoshidai headquarters, Ichijo is ordered by Kagami to cold sleep due to his rapidly progressing change into a Busoma.

Shoshidai's new weapons are no match against the demonic powers of Zsoltgewinn, pitting Ichijo and Gai against Miura in a fierce battle.