Set within the prestigious Satrikurat School, the story follows Fa, a diligent student who begins to notice strange and inexplicable occurrences surrounding her classmates and teachers. As she digs deeper into the school's dark history, she encounters Ajin, a mysterious and eccentric new teacher whose presence seems linked to the supernatural phenomena plaguing the campus. Together, they must navigate a web of occult secrets, dangerous curses, and hidden agendas that threaten the lives of everyone at the school. As the mystery unfolds, Fa realizes that the 'enigma' she is chasing is far more sinister than she ever imagined, forcing her to confront forces beyond human comprehension to survive.