Watch The Patriot

Immunologist Wesley McClaren is asked to investigate when several people near Ennis, Montana, start dying from an unknown disease. He determines the cause is a fatal virus, has the town sealed off, and traces the virus' release to a local militia leader named Floyd Chisholm. Floyd manages to infect the judge during court proceedings, and his militia followers hold Wesley and daughter Holly captive at the local hospital. They force Wesley to search for a cure, which Wesley suspects may be found in a rare herb that grows in the local wilderness.