The original soundtrack album for the first dramatic film , which deals with the life of Korea's first priest, Father Seong Dae-geon Kim.

is an epic adventure depicting the great journey of Kim Dae-geon, a pioneer young man who opened the way for the modern Joseon Dynasty. From his time as an international student at a seminary to his ordination as a priest and his martyrdom, he calmly and thrillingly depicts the difficult and touching moments.

Music director Lee Dong-joon, who is already known as Korea's best film musician, with and , etc. In this work, which presents this unique delicate yet powerful music, the magnificent sound of the Czech Prague Orchestra and the sacred harmony of the Czech Prague Choir, which has a vast scale of 60 string instruments, harmonizes with the unique Korean musical instruments to further enhance its perfection.

The best lyricist and arranging team in Korea have come together for the theme song “We are together” with lyrics attached to the main theme composed by music director Lee Dong-jun. This album, which contains the emotion of the movie , was born to be a warm gift to all of us living in a difficult world beyond religion.