A lonely kid finds out the world is already talking to him, he just needed the right candy to listen. Each sweet buys him a few minutes of conversation with the things around him, a sofa or a stray cat or his own reflection, all of them waiting for someone to care enough to hear them out. The movie understands that isolation isn't about being alone in a room; it's about being surrounded by voices you don't know how to reach. By the time the candy dissolves, Dong-Dong has learned that connection doesn't require other kids at the park. It requires paying attention to what's already there.

Dong-Dong spends his days alone at the park, where the other children never invite him to join in, and he is fine keeping himself busy with marbles. One day he spends his money on a bag of colorful candies instead of new marbles. When he tastes the first one, his old sofa begins speaking to him, and the two talk until the sweet dissolves. Soon it turns out that the people, animals and objects around him have plenty to say as well. The film is a gentle drama about a solitary boy and the surprising voices in his everyday world.