Watch The Great Monk Seo San Full Movie Free Online 123Movies. In 1581, the monk Seo-san predicts that the Japanese are planning an invasion of Korea. He goes to the king, suggesting that the kingdom build a stronger army, but he is thrown out of court. He begins training three pupils in martial arts, but rumors reach the king that Seo-san is training an army. The king sends his soldiers to have the monk arrested