On the heels of her dramatic second place finish in the Sandpiper Race, Kris is offered an opportunity to star in a commercial with Wildfire, which unexpectedly thrusts Kris and Junior together.
When Raintree takes on a well-known horse to train, Kris and Matt work together to figure out the horse's problem, only to discover the real reason Pablo wants nothing to do with it.
Kris tries to repair the rift between Matt and Junior, but the tension is exacerbated by the approach of the important Bristol Stakes and the return of Gillian, who proceeds to resume her bonding with Junior.
Junior's preoccupation with his and Calvin's business proposition takes time away from his wedding plans, but Laura suspects his loss of focus may have something to do with Kris.
Kris hopes that Flame's success in the DuPont Stakes might help Jean change her mind about Raintree's future, but Kris isn't so sure about what part, if any, play in it.
Kris is distracted by the return of her rival, Tina Sharp (Amy Jo Johnson), who is tapped to ride a Raintree boarder's horse that used to belong to the Davis ranch.
In the series finale, Junior's schedule goes haywire when an urgent matter in Alaska that requires his attention coincides with Kris' ride on Wildfire in the Tucker Stakes and their wedding.
Kris and Junior consider a once-in-a-lifetime opportunity to relocate to Alaska for a year to work on a geothermal project in the series' penultimate episode.
The fourth season begins six months after Kris was forced out of Raintree, which has undergone significant operational changes that leave Matt pining for the past.