For Henry, a seventeen-year-old who feels no fear, the day starts like any other--homeless and alone on the streets of Boston. For Sarah, a twenty-year-old college dropout, it's an early morning serving donuts and coffee to commuters at North Station. Fate brings them together at the scene of a bank robbery, which they foil together, along with a mysterious and wealthy woman named Helen, who offers to reward them for their bravery. But...