I asked 2 Users here and one didn't know it, the other suggested 2 titles but not what I was looking for.
Maybe you can help me.

Longbourn destroyed by fire, probably caused by Lydia, she dies and maybe Kitty dies, too, but only Lydia's death is important according to Mrs. B. And she blames Lizzie who didn't save her sister. Lizzie is removed from her family's temporary home, then meets Mr. Darcy and he saves her life. Probably Mary is dead, too or in critical condition caused by fire fire. Mr. B. does nothing for his daughter. Don't remember if Jane marries Charles but she definitely survives.
And there was a piano??? And a shack??? Only I have no idea how a piano can survive if a building burns to the ground.
Any idea?