What Goes Around: Comes around. Maybe. See for yourself. You can talk to Claudia in her room on the second floor of the mansion for a bit of dialog, but no mission. Next, go to the south end of town and exit the gate to find a stable of horses just outside. Hop aboard one of the horses and ride it southeast toward the map marker. Time to go to Tuscany.
You'll find Mario in Tuscany. Hop off the horse and talk to him to accept a mission against the troublesome Vieri. Follow Mario up the hill to the wall surrounding the city. You can climb up the broken portion of the wall to the parapet walk. For more info, watch the whole gameplay.
This is an Assassin's Creed II walkthrough for Mission 21: What Goes Around.
Mahalo's Assassins Creed 2 Walkthroughs are more than enough information for you to play the game yourself, and they teach you everything your need to be prepared for when playing yourself. This video walkthrough focuses on Mission 21: What Goes Around.
Assassin's Creed 2 by Ubisoft is the action-adventure video game playable on PlayStation 3, Xbox 360, Sony PSP, and Nintendo DS video game consoles, along with Microsoft Windows. It is the direct sequel of Assassin's Creed and revolves around Ezio, and is set in Renaissance Italy. Ezio befriends Leonardo da Vinci, who provides experimental weapons and gadgets, and takes on Florence's most powerful families and ventures throughout the canals of Venice, where he learns to become a master assassin. The Assassin's Creed 2 gameplay is a mixture of action, stealth, and acrobatics.