Heartland follows sisters Amy and Lou Fleming and their grandfather Jack Bartlett through the highs and lows of life on a horse ranch in cattle country. The story details how even though Amy and Lou's mother was killed in a car accident, they continue to keep their mother's dream alive by healing abused and neglected horses.
Noted horse whisperer, Marion Fleming and her daughter, have a truck accident during the rescue of an abused horse named Spartan. Marion is killed, Amy wakes up in the hospital, and the family is left with a troubled ranch to run if they wish to carry on Marion's legacy. Marion's father pitches in. Amy's older sister, Lou returns from New York, but must overcome Amy's resentment over Lou's abandoning her roots. Meanwhile, it becomes apparent that Marion was rescuing more than just horses when Ty , a young man with criminal record shows up to serve his probation period on the ranch. Soon Lou discovers that the family's financial woes may be more serious than anyone knew.