Taekwoon is having their first Christmas alone in his small apartment. His neighbor, Hakyeon, has been in the spirit since November, decking the halls, playing seasonal music and wishing everyone he came across ‘happy holidays.’ For reasons unknown to Hakyeon, Taekwoon seems like nothing more than a miserable Scrooge, and he makes it his Christmas mission to pass a little of his enthusiasm to Taekwoon.