Based on the book King of Heists: The Sensational Bank Robbery of 1878 That Shocked America, written by J. North Conway. An unassuming man in the elite New York society assembles a crew that pulls off the largest bank heist in American history in 1878.

"A modest man in the elite New York society assembles a crew that pulls off the largest bank heist in American history in 1878"

So what?

I agree with the above.

Ignoring the first sentence ...

An unassuming man ... is about the LEAST interesting protagonist I think one could choose. Even if that's part of the irony; that he's quiet and pulls off an insane heist, there's got to be a better way to describe him that would catch my interest.

What are the stakes? Why does he want to pull off the robbery?