Watchman Guangdong and his wife Baoyan have devoted their lives to their only son, Zhaohang. When he leaves China to pursue a music career at the Estonian Academy of Music and Theatre, the couple must confront the emotional void his absence creates. Through phone calls, they try to guide Zhaohang from afar, but his journey is shaped by both his deep desire to please his beloved father and his own personal ambition.

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