When Amy discovers that a horse named Spartan is being abused, she convinces her mother to rescue the horse and bring him back to Heartland. On the way home a raging storm sends their truck and horse trailer careening off the side of the road, killing her mother. Grandpa Jack helps Amy find the strength to stop blaming herself and begin the process of healing Spartan, and healing her own heart.
Mary pursues her quest for justice as she launches a counter attack on her conspirators. Elizabeth suffers a major setback that turns her world upside down.
Hijackers commandeer a passenger jet to bargain for a prisoner release. The lives of forty passengers and crew hang in the balance of negotiations over the prisoner, a relative of the terrorists.
As Ed walks her up the aisle, Donnas wedding is violently interrupted by a vengeful family seeking to do harm to everyone close to her. She is shocked to learn that her former mentor, in an alcoholic haze, revealed the identity of the cops who brought old man Logan to justice, and sent him to prison.
Bo and Dyson team up to track down a stolen Mongolian Death Worm on behalf of Dyson’s old wolf pack mate. When things get complicated, Dyson finds himself reliving his medieval days – tormented by the hard choices he once had to make, and fighting in the present not to repeat past mistakes.
