In order to reach this location, run to the fortress in Mourningwood and leave it through the gate through which the Hollow Men came. This way you will reach a cemetery . At its end there's a fork in the road. The left path leads to the mansion .
After getting there, move forwards while sticking to the left side of the garden. Eventually you should see a big stone summerhouse . Thanks to it you will be able to "create" the destroyed house. To do it, approach it during daylight (!) and remember the poses of each of the statues .
1. The man in the hat looks as if he's checking time on his watch .
2. The woman to the left of him has her hands spread out and is mourning .
3. The second man is pointing with his finger .
4. The last character is a woman with her hands up .
Once you remember everything, go to Mourningwood for a while and return to the summerhouse. This way you will speed up time and it should by dark at the Sunset House . Now your task will be to place the statues just like they were standing during the day. To do it, approach the chosen character and keep pressing A until it takes the right pose .
After completing the mission, the sun will show again and the house will be repaired . Go inside and read the book lying in the first room . The author warns you not to fall asleep inside the house.
Go upstairs  and do to sleep on the bed there .