"A story of a girl named Angel Park. She were an orphan, since she's 10 years old.  She doesn't know what to do when her parents died on the accident 5 years ago. Until Mark's came into her life, he were lost that time. He were in Korean because of the summer vacation with his parents and siblings. He doesn't even know what to do, because he were raised on L.A and he's a Chinese, he don't even know how to speak hangul. But they agreed to lived together in a apartment-- or should I say on the rooftop! You too But then, one day Mark's parents found him and decided to go back to L.A. And Mark made a promise to her that he will going back-- to find her! But she's now 18, and there's still no sign of Mark."

Will she give up waiting for him?