Salvation, like many things, is usually something we can't control. If you're stuck in a puddle of mud, for instance, and you have nothing useful in your hands like a tree branch, or a telephone, or a snack, you have no choice but to shout for help and hope that someone passes your way before you die of thirst, starvation, or worse, boredom. My point is, if you try and rely on yourself for salvation, you run the risk of sinking deeper and deeper into trouble.
Because of one man's greedy attempt at self-salvation, the Train crew find themselves in need of their own. Untangling their conundrum only entangles them more and more into the life and culture of an ancient world that has been clinging to a promise of salvation for generations.
Wounds have cut deep - through a nation, and a single soul. When it's so easy to seek revenge, do you dare to choose forgiveness?