High school wrestler Louden Swain (Matthew Modine) feels he must do something significant in his life shortly after turning 18. Despite vehement advice against it from his father (Ronny Cox) and coach (Charles Hallahan), Swain decides to try to lose over 20 pounds in a very short time in an attempt to take on the defending state champion of a lower weight class. Meanwhile, he falls for the edgy, older Carla (Linda Fiorentino), who provides further distraction for the young wrestler.
When the mystical Russell Nash (Christopher Lambert) kills a man in a sword fight in a New York City parking lot, he leaves a sliver of an ancient weapon lodged in a car in the process. After brilliant forensics specialist Brenda Wyatt (Roxanne Hart) recovers evidence of the mysterious weapon, she and her partner, Lt. Frank Moran (Alan North), embark on an investigation Of Nash that will land them in the middle of a dangerous, centuries-old feud between powerful immortals.