What if you woke up one day with some weird to-do list? What if a boy talked to you in your dreams and asked you to save someone? Well, that's exactly what happened to Han Nye. "You've got to save him, he's drowning" were the specific word he whispered in her dreams. She didn't understand anything, but, that didn't stop her from feeling anxious. Bang Chan, is one of the most popular kids in Seoul's International School. He's in the top students' list, he plays almost any sport and plays any instrument you could imagine, but, what would you think if I told you that everything was just an act? Lee Min Ho is the angel in charge of helping Han Nye saving Bang Chan. Will it be possible? Will she enter to his life just in time to save him?