When country music singers Wilder & Grace, a side act stuck on a bare-bones tour with a has-been southern rock band, stop at a lonely Arizona diner at two in the morning and find an abandoned backpack full of banded $100 bills, Grace impulsively grabs it. Money like that could make their dreams come true. Instead, it's the beginning of their worst nightmare, setting off a desperate pursuit across the West with nowhere to hide. What...