Mioka was adopted from Korea to the United States as a child. She was found on the streets in 1974 and was later adopted by an American family. But she was not an orphan, nor was she abandoned.

For years Mioka has attempted to find her roots but repeatedly failed. Then Mioka enlists the help of a Korean women's group that helps overseas adoptees find their roots. As they follow Mioka’s adoption papers to trace her origins, they soon find that documents are difficult to obtain even after multiple requests or when they do locate them, most are either inaccurate or hidden.

K-Number traces the path of Korea’s overseas adoption program, which began in 1948 with the aim of addressing the issue of war orphans and mixed-race children. The system gained momentum in the 1970s and 1980s as there were more and more adoption agencies needing children. Supported by the state, Koreas sent large numbers of children to the United States and Europe for adoption under questionable circumstances. By Seyoung Jo, S. Korea, 112", 2025.    International Premiere CPHDOX https://cphdox.dk/film/k-number/