The lore goes:  if you find the Conductor and tell him a secret, he’ll grant you a favour.  It’s all just an urban legend, of course.  There is no evidence that he’s ever been found, or, for that matter, that he even exists.
Until now.
I have a location.
Train 705.
My Plan:

find the Conductor;
collect my yet-to-be-decided favour, in [...]