There was a girl named Sarah,her mom always bring her to iceland.She met a boy there when she was a kid. Unti when she grow up she nver foget that boy but she forgot his name.She is looking for him by the help of her friend Yuna who was addict to the boy group BTS,Sarah didnt expect that one of them is the one who was she looking for. The unexpected thing that happened to her,her helecopter crash by the cliff going to iceland before that she already met the boy who met her since when she was still a kid.