If you wake up and discover that your favourite celebrity has suddenly disappeared from this world, what would you do? Pim, who is a plastic surgeon, experienced this incident. She is also a devoted fan of the popular K-pop group Little Tiger. One day, she finds she is the only one who remembers K, the leader of Little Tiger. Pim later experiences time travel to the Korean War in 1950. It was a time when Pim's grandfather, Kram, joined the 21st Royal Thai Regiment in the Korean War.