28-year-old Min-Woo (Shim Chang-Min) is a webcomic writer. One day, he finds a memo on his desk calendar. With the memo, he begins to write a new webcomic “December 8”. The comic turns into an instant hit. As the webcomic becomes even more popular, Min-Woo feels pressure from work. He begins to suffer from severe headaches because of the pressure. Min-Woo decides to seek out his first love from high school.