Briefly, assassin's life time in Italy. Back in days Italy was feeling in fear about assassin's because the leaders at that period were mean, and traitors. And the majority of leaders were working for bad things. Even though, there were a strong clan of assassins and they called "Editore family". This family had a long strong root of the originals founders of assassin's attitude.
Eaizo Editore, the son of the heroic Mario editore. Ezio was a womanizing person and a full of youth in his reality. Ezio's mother was an antique whom working with Leonardo dava inchi. At that day Ezio saw his dad in bad mode. Ezio felt so bad after seeing his dad like this, because he never seen his dad like this before.
The begging of revenge, the Vatican pulp put Ezio's father in the jail at that day, so he jumped to his father custody. And his father tell him to take all his assassin cltothes and equipments, because Eizo about to be join the assassin like his father, and brother.
The revenge, Ezio grab the theifes, and gangsters in whole floraince in Italy, to escape his father from the capital punishment that Pulp put him into it. At the punishment, Ezio come with full of rage to help his father or kill Pulp the traitor. Since, Ezio cannot get his father, his father and brother died quickly, so he changed his target to the Vatican Pulp, but the Vatican tried to escaped to rome, but he was late Ezio with full of revenge and instantly blood killers like his family. Finally he killed the traitor. And at that period his uncle "Mario" let him the leader of assassin clan editore. Since this phenomena happen all the traitors in Italy their hidden face were unmasked, so Ezio duty now put them all in the hell.