1x1 - Moon in the Day

Jun-o is the top star who is loved as the Nation's Boyfriend. To cover up his scandal, he shoots a public advertisement with the firefighters. At the set, he meets Firefighter Young-hwa who is committed to her job. An accident occurs during the break, and a mysterious being that has been following Young-hwa goes into Jun-o. And this being has only one goal, killing Young-hwa.