The Write Path To Sword Out The Truth!

Back in medieval times, the greatest king that the world had ever known was ruling the land with good morals. His son assisted him with his crafty writing skills creating treaties, battle strategies, ect. The greatest king suddenly becomes assassinated! His son knows who committed this atrocity, but no one believes him. He is exiled and hunted while the new king is causing chaos for the citizens... What'll become of the will of the land? And CAN anyone believe the truth surrounding the true nature of the king's death?