The story of Izuna Uchiha, the unknown ninja of the Hidden Cloud & Mist Village

A story of an eight year old prodigy Half Cloud and Mist ninja who doesn't know his name after an assasssination of the Raikage happened. When suddenly healed by Izuna Uchiha himself,then he was given a mission to kill his elder brother, Madara Uchiha. What would he do next?
Note: Some characters that I will be using come from Kishimoto and others appeared in The Story of The 8th Hokage:Minato Uzumaki