Jhin Pak, an 18-year-old orphan in modern-day Seoul, lives a life of misery, burdened by debt and an uncertain future. When he finally opens a mysterious door that has haunted his dreams for years, he is thrust into an unforgiving world that blends magic, supernatural forces, and political intrigue—a place ruled by secret societies and dark cults. Upon entering this new world, Jhin awakens in the body of Leonard Astraeus, a young noble who died in a failed occult ritual. Leonard’s fragmented memories slowly return, revealing that his death was tied to a dangerous conspiracy involving forgotten gods and cursed artifacts. Now, as Jhin navigates his new life as Leonard, he must survive in a world where every shadow hides a secret, and every truth is buried in lies. Caught between his past as Jhin and his new identity, Leonard discovers a mysterious and forbidden skill known as the Abyss Veil, a power that connects him to a cursed artifact with untold potential. As his powers grow, so does the attention of those who seek to control or destroy him. But with every use of his newfound abilities, Leonard finds himself drawn deeper into the conflict between occult factions vying for power—each with their own dark agendas. In the midst of the chaos, Leonard’s sister, Maya, a brilliant engineering student, becomes entangled in the conspiracy as rumors of cults and an ancient prophecy swirl around her. As she uncovers more secrets, she remains skeptical, dismissing the occult forces as nothing more than strange rumors. With the world on the brink of a devastating war between gods, Leonard must confront his own demons, unravel the truth behind his transmigration, and decide whether he can stop the cults before they unleash an apocalypse. Will Leonard uncover the mysteries of the gods and control the power within him? Or will the forces that seek to use him for their own purposes push him past the point of no return?