Graduate student Rowan Campbell is working her second summer as a Pathways Program Ranger for the Tallgrass Prairie National Preserve in Kansas when her world is flipped upside down. A gruesome attack on the bison herd at the Preserve has been discovered. The kill site shows telltale signs of big cat predation, but could a rogue mountain lion passing through the region really be the cause of all the carnage?
Rowan starts to have her doubts when one of her fellow team members goes missing, and a local game warden is less than forthcoming about what he knows. As Rowan uncovers evidence of strange lights spotted around the Preserve late at night, the suspiciously large cat tracks may be leading to a more sinister conspiracy terrorizing the Flint Hill plains of Kansas...