Against All Odds
A man named William was working his usual shift at a butcher shop when a customer told him that he bore an uncanny resemblance to his coworker, Jorge. He then showed him a picture of Jorge and William could not believe his eyes: they were identical. He got in touch with Jorge and they discovered they were born in the same hospital around the same time, and that they both had a twin.
The four of them got together and discovered that they had been accidentally switched at birth: William's real twin was Jorge's twin and vice versa. The four of them are now like brothers.