123Movies. Ammon, one of the sons of Mosiah, forsakes kingship to become a missionary to the Nephites’ mortal enemy, the Lamanites. Ammon shows great humility as he asks to become servant to the Lamanite king, Lamoni. Later, Ammon defends the king’s flocks against a band of robbers. His faithful example brings Ammon the opportunity to preach unto the king, bringing him and many others to humility, repentance and conversion.