Never in mind of 10 years old boy to move and live with his new family after his mother passed away. Joshua met his real father for first time at his mother funeral. He wouldn't believe the man when he wants to bring Joshua and adopted him to his family. Joshua would be alone if he stay in America or stay at orphanage if he refuse that man. With his innocent mind, Joshua followed the man or he should call him as his father to Korea, the new home and leaving his hometown forever. 

His father gave him new name, "Choi Jisoo" and brought this mute boy to meet with his new mother and his brothers. Firstly, he didn't think if his new mother will hate him because he is his father illegitimate child from another woman. He could feel it that his mother hates him whenever he does anything. With her beautiful face, she talked to him with hateful words, harsh at him, ect. One of his brothers, Seungcheol is same-age with him but because he was born earlier than him, Jisoo has to call him "hyung". He has younger brother too, Wonwoo who's still 5 years old at that time.

His father is the successful man and owning many business. That's why Jisoo was demand to be perfect like Seungcheol but being mute is not helping at all. All he could do is writing on notebook to interact with the others.

Despite all of that, Jisoo is really nice, innocent, and gentle boy. He loves to smile and all servants in Choi family love this new young master of their. 

Because of one accident, this lovely boy has to be caged and isolated by his father after his stepmother request. With his clumsy handwriting he told his father, "Don't be sorry, father. Jisoo will be a good boy and obey what mother has requested.".

Since then, Jisoo has to live in isolation with his butler, Jun.