Venetian conspiracy
After learning from a letter taken from one of the Pazzi Conspirators, Ezio Auditore da Firenze learns that the Templar's presence was not limited to Florence only, for the letter made mention of the city of Venice. This, paired with the fact a man from Venice was present during the meeting at the countryside of Tuscany, proves that the Templars intend ill upon the city. With the intention of stopping the Templar's plans, Ezio makes his way to the floating city.
Side-trip to Forli
Ezio made his way to the Apennine Mountains, where he managed to catch up with Leonardo da Vinci, who was having trouble with his carriage. Ezio helps him by lifting the carriage as Leonardo fixes the wheel. As he did, Ezio sees from the back of the carriage, a bat-like contraption made of wood. When he asked Leonardo, he revealed that it is an invention that can make man fly. Laughing about the subject, Ezio climbs aboard the carriage along with Leonardo, and then made their way to Venice.
Along the way, they were attacked by soldiers, presumed to be Borgia's men who were searching for Ezio. Leonardo, instructed by Ezio, hides in the carriage, as Ezio tried to shake off the attackers. Ezio managed to fend off the attackers, but it proved too dangerous for Leonardo. Out of concern, Ezio instructs Leonardo to go on without him, and tells him that he will catch up. Taking command over the horses, Leonardo leaves the countryside, as Ezio fended off the attackers, and successfully dispatched all of them. After this, Ezio made his way out of the countryside, and soon found himself in Forli.
Making his way through the city and the countryside, Ezio managed to reach the harbor where Leonardo was waiting for him. Expecting a simple passage to the boat, he was stopped on his tracks by the ferry man, saying that he needs a pass to enter the boat, since Leonardo couldn't provide one. Just then, Ezio hears a call for help by a woman who was stranded at a small land form. He gets a hold of a gondola and rowed it to the woman's direction. Taking her back to the harbor, she revealed her name to be Caterina Sforza. Caterina, returning the favor to Ezio, talked to the ferryman to grant Ezio safe passage on to the boat.
Leonardo, ecstatic at the sight of Caterina, informed Ezio on who she was when he made his way on the boat. He reveals that Caterina Sforza was the husband of Girolamo Riario, the count of Forli, and says that it is best that Ezio should refrain from doing anything that he might regret. Ezio only replied a faint chuckle, and remarked that she is his type of lady. After this, the boat continued to make it's way to Venice.