
Elizabeth Thatcher is a young teacher accustomed to high society, so she experiences culture shock when she gets her first classroom assignment in Coal Valley. Life in the small mining town is filled with challenges. A recent explosion has killed more than a dozen of the town's miners, compelling the widows of those men to work in the mines to earn money. Constable Jack Thornton, also a newcomer, is not as welcoming, because he believes Thatcher's wealthy father doomed his career by assigning him to Coal Valley so he could protect Elizabeth. Over time, though, Elizabeth and Jack become closer and begin a relationship. Janette Oke's books about the Canadian West inspired the series.

New evidence comes to light that shifts the fire investigation; Elizabeth and her classroom start a project that can impact the territory for generations to come.

A familiar face returns and brings a fun, new piece of technology with her, the polygraph; Nathan freezes when a playful line of questioning catches him off guard.

A business proposition brings folks together as they help Minnie out of a jam; Nathan's fire investigation puts him in harm's way; stars Erin Krakow, Kevin McGarry, Pascale Hutton, Jack Wagner.

Feeling the loss of her playhouse, Rosemary directs a silent film and gets the whole community involved; Lucas finds himself hesitant to open his heart again.