Reach the Red Line - part 1 | Chapter 9: Bolshoi Metro: LL Guide

The entire chapter takes place in Bolshoi Theatre's building, which serves as a shelter to survivors. This means that you aren't going to encounter any enemies or monsters. At first, follow Pavel. Traditionally for this kind of situations, it is a good idea to stop every now and then to eavesdrop on what the Independent have to say. Also, interact with the guitar near the outpost with two guards, and approach Pavel to talk to him.