Yoo Si Jin is a young and ambitious scientist.

At the age of 28 he got an opportunity to do his research at King Sejong Research station by the government of South Korea in Antartica.

The opportunity that of course, he will never miss.

Three years there means a whole new level of an opportunity offered to him.

Everyone is so happy for his achievement, including his longtime girlfriend, Kang Mo Yeon, who’s been there with him ever since the beginning.

Everything goes well, they promise each other to stay in a long distance relationship.

But, three years later when he is back to Korea, his girlfriend, Kang Mo Yeon is nowhere to be found.