The world is divided into two parts: 'The Building city' where the rich live, and the 'Hachon' where the poor live. Living in the 'Building city' with her family, Yuji dreams of moving to 'Hachon' one day. If she goes there, she might meet Seojin, who suddenly disappeared. Yuji's parents can't accept a reduction in wealth and are obsessed with their present lives. Yuji's siblings are also troublesome. Yuji's empty daily routine is shattered one day when a huge tornado hits both the city and the countryside.

Pastor Park, the head of a religious investigation center that exposes cults and cult leaders, begins looking into a suspicious new religion called Deer Mount.

Su-yeon, a cellist in an orchestra led by her fiancé and conductor Sung-jin, disappears one day, leaving behind only a video recording. Sung-jin is devasted over the loss of Su-yeon, but feels a strong attraction to Mi-ju, a cellist who fills in for his fiancée. Then one rainy night, Sung-jin and Mi-ju get swept away by their mutual desires for each other and commit an unforgivable act at Su-yeon's house.