Da-in is an autistic child. Her world is a small island on the back of a big fish. One day, Da-in leaves a journey to find a lady who was riding a horse to express her gratitude to the island where she lives in.

দা-ইন একজন বুদ্ধিপ্রতিবন্ধী শিশু। এক বড় মাছের পিঠে ছোট্ট দ্বীপ আর সেই দ্বীপেই তার পুরো পৃথিবী। আর সেই দ্বীপের জন্য একদিন দা-ইন এক ঘোড়ায় চড়া নারীর খোঁজে বের হয় তার প্রতি কৃতজ্ঞতা প্রকাশের জন্য।

주인공 다인이는 자폐아입니다. 다인의 세상은 물고기의 등으로 된 작은 섬입니다. 어느날 다인은 자신이 살 수 있는 섬이 되어주는 물고기에게 감사를 전하기위해 말탄여인을 찾아 나섭니다. 이작은 섬은 다인의 엄마 수진입니다. 수진은 다인과의 눈맞춤을 간절히 원합니다. 딸아이가 엄마인 자신과도 눈을 맞추지 않으면 너무 외로울 꺼라 안타까워합니다. 그녀의 소원을 이루워 질까요? 다인이는 과연 말탄 여인을 찾아 섬에게 마음을 전할 수 있을까요?