Wyatt Earp's great granddaughter Wynonna battles demons and other creatures with her unique abilities and a posse of dysfunctional allies - the only thing that can bring the paranormal to justice.

After the discovery of a mysterious VHS tape, a brutish police SWAT team launches a high-intensity raid on a remote warehouse, only to discover a sinister cult compound whose collection of pre-recorded material uncovers a nightmarish conspiracy.