SPOILER The closet

The original owner of the house built a closet for the dolls. It was boarded up. Aurora found that space which a. weirdly had a key which isn't consistent with boarding something up and b. wasn't big enough for a storage space. But then she kept looking for the closet, so apparently that wasn't it. She finds a boarded up closet... which is the closet the Julius family was building when the murders happened. So... now we're up to three secret spaces in the house, with the doll closet still never found.