In an undisclosed location in rural Nova Scotia, retired blacksmiths John and Nancy Little live a peaceful life, tending to their beautiful vegetable garden and crafting ethereal musical sculptures out of scrap metal. Occasionally, their special skills are put to use by the local police in an effort to protect the daily lives of all Canadians. Steeped in the atmospherics of a taut spy thriller, Gun Killers portrays two ordinary citizens as gentle national heroes.