Oh, I didn't know it was from a torrent. I missed that part.
In that case Calibre and it's plug-ins are not going to help because you have to know the account information (serial number, ade account etc) of the DRM in order to remove the DRM.
In other words, its pretty easy to remove DRM from books you've bought yourself, I don't know a way to remove DRM from some stranger's books.
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