Ryeowook had lost his twin brother and parents in a horrible car accident three months ago. Now he's homeless and 'mute' and has nobody, until one day he met a guy named Kyuhyun. Cho Kyuhyun is known to be the youngest CEO in Korea. When he met Ryeowook on the way to work, he took a fast liking to the boy, offering him a place to stay. But will he accept his offer? And what happens when an annoying step-brother and fiancé comes into the picture?