Victor Whitetail makes a surprise visit to Heartland, which stirs up the past and leaves Tim wondering if Victor was more than just friends with his ex-wife.
When a dangerous horse infection called Strangles puts Heartland under quarantine relationships are put to the test and Pegasus becomes very ill.
Amy and Ty are at odds over his purchase of a vintage motorcycle while Caleb goes off to a rodeo in Montana despite Ashley's growing concerns about his life on the circuit.
Amy faces a tough moral dilemma when she discovers Mr. Hanley has abandoned his horses and is on the brink of losing his farm.
