You are a young Uchiha during the warring states period, the worst time to be a child of a major clan.

you had a sharingan, a katana and a pouch containing lots of ninja tools

today whas anouther day at the battlefield, and you were figthing anouther child shinobi from the Senju clan. You were keeping up until you got surrounded by older and more experienced Shinobi wo could easily kill you at any moment and you out of fear started running but they were faster. You threw all sorts of ninja tools, rocks, anything to slow them down but while you were taking a turn you fell in some sort of cave and got rid of them.... but now you were stuck