Dong-han is a cellist with autism spectrum disorder. Sometimes, he plugs his ears and becomes overexcited due to extreme anxiety. Even his mother, Haesook, doesn't understand what triggers these episodes. Believing Dong-han has talent in playing the cello, Haesook has put in all her effort into training him. Dong-han is accepted into a respectable music college. However, facing biased behavior from professors, he drops out. After five years of refining his skills through priv...more

Dong-han is a cellist with autism spectrum disorder. Sometimes, he plugs his ears and becomes overexcited due to extreme anxiety. Even his mother, Haesook, doesn't understand what triggers these episodes. Believing Dong-han has talent in playing the cello, Haesook has put in all her effort into training him. Dong-han is accepted into a respectable music college. However, facing biased behavior from professors, he drops out. After five years of refining his skills through private lessons, Dong-han gets into another music school. However, the uncomplacent mother puts Dong-han through various music groups where he can play the cello to further enhance his skills. Among them, the 'Small Big' is a quintet composed of the best-performing autistic musicians. The founder promises the mothers continuous performance opportunities and a place in an art village for autistic individuals where they can live and pursue music for life. Haesook becomes hopeful about her son living independently in the future — getting him his own place to live, and taking a lengthy trip abroad without him for the first time. However, the founder of the quintet prioritizes the band’s marketability over growing their musical skills, causing great distress to Haesook. Eventually, the music director’s unpaid wage issless