A game of cat and mouse. A strange telegram lures fourteen-year-old amy cahill and her younger brother, dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initials nrr, the telegram...A game of cat and mouse. A strange telegram lures fourteen-year-old amy cahill and her younger brother, dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initials nrr, the telegram launches a race to uncover a treasure stolen by the nazis and the truth behind the murder of the last Russian royal family.