1901. When a train robbery destroy's Annie's plans for a quiet life, she reinvents herself as a redheaded daredevil and heads to Niagara Falls, determined to be the first person to survive going over it in a barrel - or to die trying. But when Annie arrives in Niagara, she unwittingly walks into a turf war between two crime bosses vying to control the illegal gambling, extortion and prostitution that hum belows Niagara's honeymoon veneer...