When he was eight, he fell into Han River. He was saved by this girl and her dog. She was very kind and cheerful and he thought they would be friends but she had to move to Jeju-do. She did, however, left him a parting gift, before leaving with her older brother to the airport. He was left heartbroken and it changed his personality. Ten years had passed since then and he managed to find her. However, now she was infamously known as the "Apathetic Princess". This had disturbed him as he was unsure of whether it was the cheerful girl in his memories or this new, cold-hearted girl. Whatever the reason was... he vowed to win over her frozen heart; surpassing obstacles and trials on his way.