Iyars has always lived in solitude—no family, no friends, no purpose. Every day is the same dull cycle of work, eat, and sleep. But one night, everything changes.

A mysterious butler appears before him, offering a black-red invitation card adorned with a crescent moon split into two colors—red and blue. The message inside is as unsettling as it is intriguing:

"Congratulations! You’ve been invited to the greatest party on Earth—an event that only happens once every 1,000 years. Those who receive this invitation seek something... wealth, power, desire... or the truth of their past."

Haunted by the gaps in his own memory, Iyars can’t resist the temptation. The moment he signs the card, his world shatters—literally. Pulled into an unknown realm, he finds himself in a lavish, otherworldly masquerade where reality bends, and danger lurks behind every masked smile.

Guided by a mysterious young man named An, Iyars is thrown into a night of illusion, temptation, and dark secrets.