Quest of the Pale Lord. (The Incredible Adventures of Van Helsing)

For reasons understandable to some admins, the topic on the passage of the game is closed, therefore I ask the question in a separate topic. The second chapter, the port, the pale gentleman, before descending to the headquarters, gives the quest to remove his competitors. We climbed all the locations of the second chapter and completely the Old City in the third - we can’t find it. Where to look for them, people?