These excerpts are from the lyrics of the music 迷子犬と雨のビート by ASIAN KUNG-FU GENERATION:
Who is having the bad dream? Is it a dream about dolls or is it the dolls that are dreaming? Then the second line continues saying that something (the narrator or the dolls?) was forcibly hidden in a warehouse. Is this a exemple another type of bad dream or it is still talking about the dolls?
The third and fourth lines seems easier, as it just says that whatever was hidden in the warehouse is gathering dust and being hidden from sight (cannot be found) and that it will not be able to touch anyone's hands. Is my assumption correct?