Sentenced to death for a simple confidence trick, Mary Jebb escapes the gallows...but her reprieve is harsh: seven years in the penal colony of Botany Bay. Yet Mary is determined not to be forgotten, sending two pennies, engraved with a promise, to the men who sealed her fate. Artist Grace Moore jumps at the opportunity to marry handsome Michael Croxon—if only to get away from her drunken father. But when Grace takes on a new cook, the two penny heart love tokens reveal she is tied to a world of deceit, double-crossing, revenge and murder.