A man appears from nowhere, with no discernible past or history, and collapses at a hospital. He has no recollection of his past and he seems consumed by some kind of guilt that he won't speak about, although he isn't exactly dangerous as such. The setting isn't super important but for ease it'll be either in the UK or USA - probably the UK due to our public health care. I'm assuming that he'd be referred to some kind of mental trauma unit? Would he be kept in a ward or just given intermittent therapy? And once he appeared to have recovered (still no memory, but functioning normally & healthily) what would happen to him? Where would he live/go? I assume they'd provide accommodation but where/what would it be like? Shared accommodation? A flat? I'll tweak reality if I have to but obviously I want it to seem realistic.