정체 불명을 밝혀내라
Your investigations of the catacombs of Lima appear to be going well. I'm not sure why, but T'ika has something he wants to discuss with you. Probably something about your investigations. He's apparently been muttering something about ghosts and food. Well, he's always talking about food, but this seemed like something different.
I could go through this all step by step, but basically you run around talking to various people in Lima, then go out the north gate and go due north to the landmark, click on that, done.