Yongguk and Dara are a young rebellious couple out on a romantic holiday, when all of Korea is sent on lockdown due to a deadly viral epidemic. Unable to leave their inn by the sea they struggle for survival - as supplies run out and allies vanish - and are confronted with the mistakes of their past. They are about to give up hope, when Junhong turns up out of the blue, telling stories of survivor camps. But are they too good to be true?