Grant and Blair Ty's Travel Buddies return to Heartland. The issue of Blair kissing Ty and deciding not to tell Amy is resolved with Ty and Amy breaking up and Ty leaving Heartland and moving in with Caleb and Ashley. Also, Caleb and Ashley have difficulty adjusting to the reality that they aren't legally married. Caleb receives some sage-like advice from Tim. Mallory's adventure of being locked in the horse trailer and being returned to Heartland by the police is still reverberating. Meanwhile, Lou gets some news that will have a huge impact on her and Peter's lives.