D.A.R.K. is a group of 4 music driven girls, who recently got a weekly gig at a popular club in Seoul. When Kang Daesung of the globally known boy band BIG BANG sees them perform his role reverses. A huge celebrity turns into a huge fan-girl. He instantly becomes obsessed with them, and in paticular the maknae and vocalist Park Kyun Hae, who only focuses on 2 things in life which are music and her 3 friends Tae Ri, Min Na, and Hea Jung. Daesung newly obtained fan-like habits cause his fellow members of BIG BANG to make ties with the D.A.R.K. members and start a interesting friendships and relations.