As Amy struggles with her injuries, family members are pitted against each other.

Amy is faced again with Ahmed's horse, and must overcome her fear to save the horse from euthanasia. Lou leaves on her book tour. She leaves Peter, Georgie, and Jack to sprucing up the dude ranch, a task better said than done.

Amy goes under cover to catch a Tennessee Walker's abusers after Ty brings it to Heartland to recover.

Jack's old flame reappears and everyone thinks they should give it another chance.

Jack and Lisa are lost in the woods, but a trip down memory lane may just help them find their way.

After returning from a visit to Moosejaw, Tim suddenly decides that his faithful, older ranch/cattle horse isn't enough for him anymore, and he buys a new beautiful, young cutting horse - Smoke 'N Mirrors. He convinces Amy to help train them in hopes of rejoining the rodeo lifestyle, but Amy soon realizes that the young horse might be too much horse for Tim to handle. Jack tries to figure out what happened during Tim's trip that spurred his mid-life crisis. Lisa's ex-husband, Dan, rocks-the-boat at Heartland when he stops by to pay Amy, informs Tim and Jack that he's expanding his business to include high-end rodeo and cattle/ranch horses, which further fuels Tim's obsession with reliving his younger days, then tries to sow doubt about Lisa and Jack's future together. Georgie hopes to audition for a trick riding team, and attempts to teach herself a potentially dangerous new trick, resulting in her instructor expelling her from her class.

Lou finds she has trouble adjusting to normal life after returning from her book tour by sticking her nose into everything that is not her business, especially Amy's.

Amy contemplates a job offer from Prince Ahmed. Ty and Amy fight over Ty not telling her about the horse he and Caleb invested in. Lou has to swallow humble pie in regards to Tim's changes at Maggie's. Georgie makes a new friend.

Caleb and Ty finally convince Amy to ride Charger in the Futurity race. Lou feels bad because Georgie won't call her "Mom." Jack and Lisa finally make a decision about their future. Ahmed makes Amy an offer she can't refuse.