House of God

The fast-travel point outside the lab is working now so you can use it to return to Halai Village to resupply or sell some loots. Once ready, fast-travel to Mataka Village and head to the objective point. Follow the trail leading to the Santa Maria mission building.

Kill all the marked undead in the area. Be careful since there's Quickdeath zombie here. Once cleared, loot the chests, ammo and medkits. There is also a fast-travel station here. Head inside to find the flooded entrance and wait for the scene to finish and complete the mission.