After leaving Isaac’s bedroom during chapter 3 of Luto, the screen will display the title of the chapter. Once again, you’ll find yourself inside the bathroom, and shortly after stepping out, the surroundings will turn pitch black with no lights in sight. Someone will also be knocking on the door. Problem is we cannot find our keys. After repeatedly trying to find find a way to answer the door, it becomes clear that you’re trapped in another puzzle. Here’s how to escape and solve the Luto house puzzle and how to use the Moon Key in Luto.
How To Answer The Door In Luto Chapter 3
After exiting the bathroom, proceed and walk through the dark corridors and head downstairs. Near the stairs, you’ll find a flashlight that you can use to see in the dark. Press “F” to turn it on. Alternatively, R3 on the controller.

Continue toward the entrance door and pick up the sketch with the text “Behind the Moon.”


Solving The House Puzzle Involves Finding A Key
Head back upstairs and examine the wall with the portraits. There are four in total, and you’ll need to find the one that most closely resembles the sketch. In this case, it’s the one on the far right.

Tap the portrait which will cause it to fall down and to the floor. You could also find a note behind the portrait titled “Grandpa’s Farewell,” which is one of Chapter 3’s collectibles.
Look back at where the portrait was originally placed, and you’ll notice a crack. Click on it to obtain the “Key with the Engraving of the Moon.”

After that, head downstairs to where Grandma Dolores’ chest is located. On the stall table with the lit candle. Now we can unlock it with the key. Inside, you’ll find a miniature door that resembles the house’s main door.

As soon as you grab it, you’ll hear a loud sound, and you’ll notice that the main door has been broken down and is now nowhere to be seen. Finally, leave the house and solving the Luto house puzzle
Check out more Luto guides!
| Chapter 4 Luto Chest Puzzle Guide – What’s Lock Combination? |
| Luto Bulletin Board Puzzle: Where to Find the Three Drawings |
| Inside The Bedroom: Luto Finding The Hidden Monkeys Puzzle |
- Slay the Spire 2 Crystal Sphere Event – Uncover Future or Payment Plan - 1st April 2026
- How to Beat Slay the Spire 2 Soul Fysh boss - 1st April 2026
- Slay the Spire 2 How to Defeat Bygone Effigy Elite - 1st April 2026
