Below is a walkthrough on Sister Act side quest in Dying Light 2 Stay Human. To obtain this quest, speak with the Old Man on a roof west of the Metro: Waterside in The Wharf.
Go to rescue “Mia”
Travel to the Dark Hollow in northern Downtown then defeat all the enemies inside as you make your way up to a locked room. Approach the girl to trigger a brief scene then continue defeating all the enemies.
Meet the girl at the windmill
Once you’ve cleared it out, travel to Walnut Windmill. When speaking with the Old Man, you’ll be presented with a choice. We chose to spare the old man and pretended to be his grandson. Mia thanked us and said she would explain to the old man later why we had to go.
Rewards
- 1500 Combat XP
- 1500 Parkour XP
- UV Bar