Dark workers at large

It was a sunny Sunday morning, in a peaceful suburb of Manchester when darkness loomed. Sounds like the opening of a Agatha Christie ‘Miss Marple’ novel doesn’t it? Sadly, as with her stories, the tale gets dark pretty soon. I was with a friend, at a laundry, just passing the time, you know. When I noticed a couple of Asian gentlemen passed by the window. I don’t know why they caught my attention, but they did. They had looked in and seen me too, but had carried on. Then, a few seconds later they reappeared and walked into the laundry. Innocent enough so far – maybe they were lost and needed direction? They approached me and opened up a conversation. apparently they were holy pilgrims looking to raise money for some place of prayer...