Since her family's secrets scattered her to opposite sides of the world, Violet Cunningham decides to suppress the traumatic memories of her past and return to the Scottish boarding school in the Highlands that she once called home.

After a student is discovered missing, Violet bonds with new and old friends as they start to uncover the truth behind Julia's disappearance, giving themselves the secret group identity know as the Silencios.

The teachers who once seemed innocent become secretive and Violet wonders if they had anything to do with her disappearance.

As mysterious keys, ancient artefacts and cryptic messages start to appear that seem to be linked, is this a coincidence or destiny pointing them in a particular direction?

After the discovery of an old photograph dating back to 1895, the Silencios uncover a hidden library cloaked within the forest walls surrounding the academy. Resulting in more questions than answers.

But no one knew what sort of mysteries and life-threatening danger lurked in the shadows.