Based on a 2010 novel of the same name written by Kim Eun Jung.
Hoo Joon (Choi Tae Joon) is one of the biggest stars in the South Korean entertainment industry. He attends an event at a new nightclub. Lee Geun Young (Choi Sooyoung), who aspires to be a magazine reporter, is sent to the opening party, where she unwittingly witnesses some rough and rude behavior from Hoo Joon.
Later, the magazine decides to fire her and she assumes that it was Hoo Joon who instigated her firing. Outraged, she decides to organize a demonstration in front of the star's agency. The media noticed her protest and she became known as his number one "anti-fan".
The production team of a new entertainment show, not lacking in opportunism, decided to take advantage of Lee Geun Young's sudden fame. The producers go to her to talk about their concept: a star is forced to live with her biggest "anti-fan".