Yun Hwa Pyeong, a young psychic born into a shaman family, learns about the powerful demon called "Son" (Guest). The demon has the power to control other demons and allows them to possess weak people. The possessed people then go mad, kill their families, and stab themselves in the eye. Fatefully, Hwa Pyeong, Choi Yun; a young boy born in a religious Catholic family, and Kang Gil Yeong; the daughter of a
