Tania is supremely Aware and exceedingly headstrong. Her parents have kept her shielded from the full extent of her Awareness in order to protect her from herself, but now that she is twenty, the time has come for them to relax their guard.

Tania's abilities begin to emerge, striking awe into those around her, but when she disappears in the middle of the night, all in Rockwood are left shocked and grieving. All, that is, except for Will and Amarilla, who know exactly where she is and why. They also know that they will need to follow her if she is to survive long enough to help the horses whose call for help she has answered - and help the horses she must, for they are the safeguards of humanity...