The hanging tree

In the midst of the Uchiha massacre, Itachi changes his plans. He cannot bear to be the downfall of his precious little brother, and thus takes things into his own hands. But how long can the sheltered Sasuke hide from the fate Itachi has sealed for them? What is his brother's mysterious organization, and who is the child from the village? [AU. Minor Itasasu. Narusasu. ]