The phrase 'guys pulled a trian on my wife story' is really ambiguous. It might be a made - up or very specific story within a certain community or group. If 'pulled a train' is some sort of non - literal or regional term, it's difficult to decipher. It could be about an event where the guys and your wife had an encounter related to a train in a way that is either positive, like they helped her with something train - related, or negative, like they caused trouble for her around a train. But this is all just guesswork without more information.
I'm not sure specifically what this story is about as the description is very brief. It could potentially be about some sort of prank or accident where some guys are involved in an action related to a train and your wife. Without more details, it's hard to say for sure.