There is a secret hiding inside the remote Vermont farmhouse where eleven-year-old Becky and her family move after her father is fired from his job under mysterious circumstances.

A guardian emerges with an ominous warning that someone is coming through a mirror to take Becky from the safety of her new home, and leads her to the discovery of artifacts hidden under her bedroom floor. That same night she finds an abandoned puppy destined to protect her, and whose collar causes the artifacts to turn on. An ancient battle resumes for control over a secret once thought buried too deep to be uncovered. As more mysterious creatures arrive, how will she know who is there to help and who means her harm?

Becky and her new puppy must race to interpret the warnings, overcome their fear of sinister forces, and trust in new alliances to solve a compelling mystery that has been hidden from her family for generations. But is it too late?