Prince Kim Gyo-jak of Silla, deeply entangled in court intrigues from a young age, witnesses the brutality of war and the sacrifice of his closest friend. Determined to break free from the shackles of royalty, he crosses the sea to the Tang Dynasty. On the docks, he takes in a stray dog named Diting. Together, man and dog embark on a journey across the Tang lands in pursuit of the true essence of Buddhism, seeking to complete their genuine spiritual cultivation.