Assassin's Creed 2 Walkthrough

Trigger this mission in the center of town. A couple of conspirators meet up and begin walking away from you. You need to trail them, but obviously you don't want to rouse their suspicion. Stay close enough that they never leave your line of sight, but try not to run or do anything else high profile. If a nearby guard bumps into you and gives you crap, turn the other cheek. If you get into a fight, you stand a good chance of blowing the mission.

Occasionally, the pair you're trailing will stop and look around. Do your best to blend, or simply increase your distance to keep them from suspecting you. If there's a nearby group of courtesans, you can hire them and have them surround you for instant cover. The courtesans will also be useful when the conspirators move past a line of guards blocking your path. Send the ladies to distract the guards so you can continue past 'em.

The pair move to a large open area and meet up with more conspirators. After the cut scene, the same rules apply—follow 'em, but don't get spotted. You should probably be hiring every group of courtesans you pass, as they'll get lost in the shuffle and you'll lose your cover as you progress. They don't cost much, and you shouldn't be sweating that kind of money at this point in the game. Eventually, you'll make your way to a dock where a cut scene closes out the mission.