Amy leads a rescue search to find Ty and Scott, whose plane has gone missing in a remote forested mountain area.
While the boys head off on a fishing trip, the girls are left back at Heartland to deal with the havoc caused by a dog, a porcupine and a herd of escaped cows.
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.
