I'm pretty sure there are many stories that roughly follow this plot:

1 - Person A discovers something.

2 - Person B is sent to "deal" with them.

3 - Person B winds up protecting person A.

Which is not in and of itself ridiculous, but we have to remember this is a story about people with swords made of gunpowder after people forgot how guns worked.

But why chills?

Possibly because trailers are designed to do that, Jay. They even make music specifically for trailers. I genuinely have albums in my music library that exclusively have music intended for trailers.

I don't mean for specific movie trailers, either. I'm pretty sure choice snippets of "In League with Cerberus" by Trailerhead was being used in approximately ten billion movie trailers at one point.