Once upon a time, a kid named Ezio was born in the US on June 21, 2077. He was living in the US during a miserable period, but his parents were trying to give him a good life. His parents saw there was a boat going to Japan, so they illegally introduced him to the boat. So after this journey, he learned to live on his own by stealing money from random people.

When he was 17 years old, he decided to celebrate his birthday to commit the biggest robbery of his life, a ring worth more than $1,000,000. Unfortunately,  that day he was caught, and he was forced to kill a very rich man, which made him very wanted.

Forced to hide in the smallest corners of the city, one day he meets a girl who offers to join him in exchange for housing. With a lot of despair, he accepts.

They lived just from robbing people and one time when they got to rob a old man they got caught so they implored hem to let them live, the old man was good so he said he would only let them live if they help hem to kill one of hes enemys, Abou Bakr Almasi IV, but to be able to do this they needed to know the Assasin art, so the old man accepted to teach them hes ways.