Banned substances are a big problem in the world of body building. Ken is hired by Matthew Park of International Natural Bodybuilding & Fitness, Canada, whose premier competition is fast approaching. Ken must polygraph all athletes to ensure their chiseled physiques were achieved without drugs. Not only is Matt's reputation on the line, but for the athletes, being branded a cheater is death to their natural body building careers. The pressure is on Ken to keep the competition fair for everyone.

The Lie Detective is a character-driven factual series that follows the work of independent Polygraph Examiner and self-professed truth seeker, Ken Donaldson, as he helps people from all walks of life in their quest for honesty, resolution and freedom from deception.