Eun-su was on his way to meet his mother but got into an accident and fainted. In the deep of the night, he opens his eyes to find himself in the forest and there stood a girl. She took him with her and Eun-su follows her to the "Delighted Children's Home" where three children live. This house is full of cookies, a children's heaven, but there's no way of communicating with the outside world, and no way to the forest exit. There are also many strange things that are happening in the house, including the caretaker's behavior.