Jin-wook and So-ri couple have been dating for 6 years. So-ri randomly suggests that they should go on a trip along with her best friend Mi-ra and her boyfriend. It is because she promised with Mi-ra before that the four should go on a trip together once Mi-ra has a boyfriend. Jin-wook does not feel comfortable with her plan because he has not been interested in So-ri’s friend at all and has not had a meal even once with the friend together so far. However, he unwillingly decides to go on the trip. As Jin-wook heard that Mi-ra and her boyfriend would prepare all of camping

Song-young and Song-mi are sisters who came all the way from Seoul to celebrate their mother’s birthday. While spending the happiest moment in the world, Yoo Jae-ma, a notorious serial killer on the loose drops in. However the girls and their mother find out the truth behind his murders.