Act I: Through the Motions, to the Heart

Head towards Springvale and look for Schubert. Teleport to Springvale and head northeast to find Schubert outside his tent. Choose the following dialogue options for a smoother flow: "Please, if I may be so bold as to say a few humble words…", "It is an honor to stand before you here, immersed in your supreme brilliance.", "I refined my conduct with some instruction in the classics, courtesy of a dear friend". Paimon will offer Schubert Gebratenes Fleisch mit Sauerkraut.

Go with Schubert to meet his “friends”. Teleport back to the Springvale Waypoint (a marker on your map you've manually placed as a destination) and head east towards the cliff to find the Domain “Behind Enemy Lines”. Interact with it to enter. Bring along a Hydro and Cryo user to make the Domain easier.

Follow Schubert. After entering the Domain, you will be wearing a mask. Make up a lie to Schubert and follow him down the path.

Talk to the Fatui’s guarding the entrance. It doesn’t matter what you say.

Keep following Schubert. After passing the Door of Resurrection and going up the stairs, you will encounter Sergei. Schubert agreed to bring the Fatui a diagram of Mondstadt’s defenses. After hearing this, unmask yourself.

Defeat the Fatui. You will battle one Anemoboxer Vanguard and one Electrohammer Vanguard. Take out the Anemoboxer first, then the Electrohammer. Using Hydro and Cryo can help freeze them.

Chase Schubert. Head back through the door to the south. Schubert will have been caught by Eula and a Knight of Favonius. Eula will offer to help you recover the diagram.

Go deeper within and retrieve the diagram of the city’s defenses. There is a Common Chest behind a makeshift tent to your east. Continue north, up the stairs, and attack the flamethrower turrets with a Cryo attack. Make your way across the fiery bridge and use a Cryo attack on the final flamethrower turret in the next room to your left. Go up the stairs, and you will face two Geochanter Bracers. Use Eula’s Claymore attacks to defeat them. Open the Common Chest hidden in the eastern railing. Proceed through the door, go up the flight of stairs, and through the next door. In the next room, you will battle one Geochanter Bracer, one Pyroslinger Bracer, and one Anemoboxer Vanguard. Take out the Anemoboxer first, then the Geochanter, and finally the Pyroslinger.