[She'll let that one go, because, no, Magnus, you have no idea what's happened in this place. None whatsoever. And she won't be telling you any of it either.]

Well, the short version is that this is a pocket dimension where folks are brought ta earn a second chance at their lives. Sometimes the ride gets a little bumpy and things go haywire. Which is why you're gettin' phone calls from a lot of...unexpected folk.

[And that is a super condensed version, that leaves out a lot of details.]