With no Kekkei Genkai and no cheat ability, twelve-year-old Tsukigakure Shin is nothing more than a bottom-tier cannon fodder from Konoha.
On a battlefield piled high with corpses, he stumbles upon irrefutable proof that the people above him sold him out as bait. This evidence completely shatters the so-called "Will of Fire": it was nothing but a lie meant to send people to their deaths.
In the pouring rain, he stays alive long enough to cut away the rotting flesh on his thigh. Using crude methods, he forcibly stitches the scroll of evidence into his body, then crawls back to Konoha covered in blood and mud.
If obedient people have only one road ahead of them, and it leads to death, then he has decided to become a mad dog, one that wants to bite anyone it sees.
Armed with a broken blade curled at the edge, he gets swept into the power struggles of the village's upper ranks. He will cleave this seemingly hypocritical shinobi world right down the middle. Anyone who stands in the way of his survival will have their throat torn out by his teeth.