Left to perish on a bank of snow as a baby, Amy has never known love, never known family.

Reluctantly given shelter at nearby Hatville Court, she is despised by the masters and servants alike.

The beautiful Hatville heiress, Aurelia Vennaway, is Amy's only advocate - she becomes the light of Amy's life, and the centre of her existence.

So when Aurelia dies young, Amy's world collapses. But Aurelia leaves Amy with one last gift.

A bundle of letters with a coded key. A treasure hunt that only Amy can unlock.

A life-changing secret awaits... if only she can reach it.