At the beginning:
"A young man, only seventeen years old, but tall and proud."
Ezio was a young guy who does not want to take routine and other responsibilities which are borne by the financier, like his father. He knew that his calling was not a census and accounting of papers. He felt it but could not find. But age came up to his own time and he knew that soon the free and dissipated life to which he is accustomed will end soon, for against the father could not go. Not waiting for the future that awaits him, he didn't want to waste a minute of time remaining.
Ezio on the path of revenge for 30 years meets many different people, whose views coincide or contradict it.
But listening to and each of them, he becomes wiser and stronger, stepping over our weaknesses, over time he enters the brotherhood of assassins.
Paying on merit of new enemies, he proves that the former 17-year-old boy has grown up and is not the same as before.
He became head of the brotherhood and is out for vengeance, and the path of honor and dignity. Having lost virtually all family and friends, he does not give up and continues on his way.