Sang-yeon is a pastor who was adopted from Korea into an American family in childhood. He visits his native Korea after a long time when he reconnects with his biological family--his birth mother and brother--with help from a television show. A touching reunion of long-lost brothers quickly dissolves into an awkward situation when Sang-yeon discovers that his younger brother has become a shaman, and his brother likewise learns that he is a Christian pastor. Meanwhile, their mother, who suffers from dementia, wanders off, out of the studio, and boards a random express bus. Even before the embarrassment wears off, the brothers are forced to put their differences aside and go on a search together for their missing mother who seems to stay one step ahead of them as she travels around the country.