When General William T. Sherman commissions Ezra Justice to form a secret band of cavaliers to help end the war between North and South, his order may impact the West as well.

Justice, a complex southerner of simple faith, gathers a pro-Union posse of diverse multinationals second to none in their fighting abilities.

There is Nathaniel York, an African-American who once slaved on the Justice family plantation; Reginald Bonesteel, a British sharpshooter denounced by the Queen of England; Harry Whitecloud, a soft-spoken Indian warrior and medicine man; Shaun O'Banyon, a strapping Irishaman who'd fight an entire army himself; and the Hawkins twins, Gypsy-blooded brothers who do a bang-up job with explosives.

From dusty canyon shootouts against Confederates to the horrors faced aboard the doomed steamship Sultana, these dynamic men shine as good-hearted heroes who need each other just as much as many others need them.

But how they can stay together after the Civil War is a question that's as wide open as the Old West itself.