The opening door is not unlocked by entering a code on the door itself. You first have to make the coach leave, recover a tool, and expose the hidden key.

Short answer

Collect the two loose tin cups, place them at the right-side window, and arrange all five cups by stripe count from 1 to 5. Use the resulting coin to pay the coachman. Take the iron bar after he leaves, pry up the loose board beside the planter, and use the hidden key on the front door.

Step 1: Collect both cups

  1. Leave the coach after opening its curtains.
  2. Open the window near the entrance and take the first tin cup.
  3. Speak to the coachman.
  4. Open the small compartment below the coach to collect the second cup.

Step 2: Solve the cup puzzle

Go to the window on the right side of the estate entrance and place both cups there. You should now have five cups in the puzzle.

Arrange them from left to right according to stripe count:

1 stripe → 2 stripes → 3 stripes → 4 stripes → 5 stripes

When the order is correct, take the coin from the first cup.

Step 3: Find the key

  1. Give the coin to the coachman.
  2. Once the coach has gone, pick up the iron bar.
  3. Use the bar on the loose board directly in front of the planter. Move it until the board lifts.
  4. Take the revealed key.
  5. Use the key on the estate’s front door.

You can now enter and continue with the servant contract and breakfast assignment.

If the puzzle does not react

  • Confirm that both loose cups were placed in the window puzzle.
  • Count the stripes rather than arranging the cups by size.
  • Make sure every cup sits fully in a position before checking the order.
  • If an item is missing after a launch-day update, check the official Steam news for a current inventory or save-related hotfix before assuming the puzzle solution changed.