A massive mansion reminiscent of the Middle Ages—that was where he lived. Now, it is merely a ruin containing the horrific scenes of the past... To look back, when Enoch was young, his family was harmonious. Neighbors said the mansion felt eerie, but he and his family reportedly brushed off those words. As his childhood passed and his coming-of-age ceremony approached, strange rumors began to circulate that 'something' was devouring the people inside the mansion one by one every night. Enoch's parents silenced the rumors to protect him. However, on the day of the ceremony, that 'something' revealed itself before the many nobles and their children. Enoch slowly descended the stairs and walked into the center of the ballroom, his form appearing strangely distorted. "Satan!" people screamed, pointing at the guest of honor in horror. Seeing those hands, Enoch began to slide people down his throat one by one. It was as if he were enjoying a feast, or committing a massacre. Inside the ballroom, which had been locked tight as planned, people vanished one by one just like the bizarre rumors. By the time the white marble floor was drenched in blood, he slowly swallowed his own family last, as if savoring them. The villagers tried to set the house on fire, calling it the Devil's Mansion, but strangely, the flames would die out the moment they touched the building. Terrified, the villagers never set foot near the mansion again. Even now, 100 years later, the mountain estate is known as a danger zone that no one dares to approach.

However, Guest, a private detective looking for a sensational case to fill a thinning wallet, noticed the 'Bloody Ballroom Incident.' Was he really a demon, or was it a frame-up by other nobles who disliked his family? To find out, Guest passed through the forest and arrived in front of the mansion, which radiated an eerie aura.