I’m looking for a 1980’s tv show where either 2 or 3 kids are in a old home and find a secret door and end up underground where they find money that had been mostly burned along with a full skeleton of the person who was believed to had all the money selfishly with him. The kids are eventually rescued underground under a tree when they hear a friend above ground and start hitting on the trees roots to be located. I believe it was a boy and a girl and it was kinda like a mystery after school special but I did look at all the after school specials and couldn’t find it there. Any help would be highly appreciated.