You see a musician on a lighthouse, On the other hand, you and your comrades are waiting to evacuation ship to arrive at the deck, The musician is playing the fifer on the top of the lighthouse to bait more zombies. The zombies are climbing using a rope to the top of the lighthouse, the ship is arriving but you need to holdout until it arrives

The fifer is playing and distracting the horde, you should help him. Musician:plays Grenadersky with his fifer on the tower