Five years after surviving Art the Clown's Halloween massacre, Sienna and Jonathan are still struggling to rebuild their shattered lives. As the holiday season approaches, they try to embrace the Christmas spirit and leave the horrors of the past behind. But just when they think they're safe, Art returns, determined to turn their holiday cheer into a new nightmare. The festive season quickly unravels as Art unleashes his twisted brand of terror, proving that no holiday is safe.
In 1987, bloodied man Soo-ho jumps into a women's university dormitory in Seoul. Yeong-ro, a female student who fell in love with him at a group blind date, tends to his wounds as the dormitory is ensnared in intense surveillance. As Soo-ho's secrets unravel, he must eventually face the conflict between his heart to Yeong-ro and responsibility to his comrades, as well as to his sibling who awaits him in his home country. What will be of their fate?