Ep 4. The Garden of Amahara

Rin, Yukio, and Shiemi are sent on a mission to retrieve a sacred sword that has been stolen from the academy. The trail leads them to a hidden garden known as the Garden of Amahara, famous for its beautiful and deadly botanical specimens.

Upon arriving, the trio is met by one of the garden's caretakers, Tatsuma Suguro, who informs them of the dangerous plants that inhabit the garden. While exploring, they come across a plant that emits a powerful hallucinogenic gas, causing the group to experience vivid and disturbing hallucinations.

During his hallucination, Rin learns more about his past and his relationship with his father, Satan. He also hears a mysterious voice urging him to embrace his inner demon. Meanwhile, Shiemi is tormented by her insecurities and fears about her abilities as a exorcist, while Yukio confronts his own inner demons.

As the group tries to navigate the dangerous garden and battle their inner demons, they discover that the sword they were sent to retrieve is actually a powerful demon weapon that can only be wielded by those with demon blood. The group faces tough decisions about what to do with the weapon and whether they should trust those who seek it.

The episode ends with the group successfully retrieving the demon sword and returning it to the academy, but Rin is left grappling with the knowledge that he may have demon blood within him and the possibility that he could become a danger to those around him.