Lou sends an uncured horse back to its owner, which causes friction with Amy. Ty builds Amy a jumping ring and Jack decides to keep Ty on at Heartland.

Nick Harwell arrives to train Ben but becomes interested in buying Spartan. Mallory thinks Lou plans to re-home Copper and runs away with him, only to discover a plot to sell wild mustangs.

When Tim gives Amy a beautiful Grand Prix jumper for her birthday, she's forced to make a difficult choice between a career in show jumping and her work at Heartland.

Out for a ride along the river, Amy comes across an RCMP officer desperately trying to save a young boy from drowning. Scott misinterprets Nick Harwell's polo match invitation to Lou as a date. Mallory seeks Jack's advice on how to deal with her love life.

Amy scratches the surface to discover Nick Harwell's problems with his polo ponies, Lou's life in Dubai and Tim's relationship with his jockey are not what they appear to be.