As the world forms around you, you'll become Haytham Kenway walking into an opera house. Your carriage driver will ask you for details on where to pick you up as you enter. As any good guest, walk into the building through the front door and follow the guests making their way into the theater. Walk up a couple of rows and you'll have to slide into your row. Slide along until you automatically sit down next to a friend.
After a chat with your friend, you'll be prompted to pick out your target by using Eagle Eye. Push the left stick in like a button (L3). The entire world will turn dark but one of the balconies up and to the right will glow a bright gold. Look over towards it and your conversation will resume. After a short chat, you'll be shown the path you should take to get there. Slide to the end of the row and then head into the nearby room.
Once in the room, run up the wall and then slide to right to enter the theater again. From here, climb up as far as you can and then continue right until you can't any more. Climb up and continue this pattern until you come to an empty balcony. Climb in and walk through the door on the right.
You'll have to pick the lock to enter the next room. To pick the lock, rotate the left stick until it rumbles, then stop moving the stick. The prompt on screen should then tell you to move the right stick. Do the same with this stick until it stops moving. Finally, you'll be prompted to jam the lock and break it. Keep at it until you break the lock and the door opens.
Go through the door into the room beyond. Walk onto the blank ahead and jump to the prop in front of you. It will slide down and at the bottom head to the left to continue on. Follow this until you land on another walkway. Go up the ladder and then turn right to climb the wall. Head left again to move to the next prop and from there, move left again to the next wall. Go around the wall and keep going left until you can't anymore. Climb up and go through the door here.
You'll enter the balcony of your target and after a quick chat, you'll be prompted to stab him. Do so and you'll walk out of the room. When you next regain control, walk down the stairs in front of you. At the bottom, turn right and then right again. Watch the man get tackled and at that intersection, turn left. Walk into the crowd of patrons and at the end of the hall, turn right. This will take you back into the upper section of the theater. From there, walk across the room and you'll enter another hallway. Turn left and go down the next set of stairs.
Follow this carpet and it will lead you to an atrium through which you can leave the building. Leave and your carriage driver will pick you up.
