"The crowds at the Tower of London love nothing better than watching an execution. Preferably while eating a pie. Not Moss. She'll never get used to beheadings, no matter what Pa says. She watches the river as it flows past and longs to escape. Salter lives on the river. Using his wits and his boat, he believes that life is mostly about staying alive, and if that means stealing -- well, that's life! But danger is lurking on the riverbank, and its murky depths hide a secret that could change everything...