Heartland takes in a pregnant mare named Melody. Ty secretly asks Mallory for riding lessons to impress Amy. Ben competes in a horse show and refuses to talk to his aunt Lisa. Meanwhile, Jack and Ty go on a cattle round-up, and Tim is introduced as the trail boss. Jack and Tim fight each other that night, and Ty learns that Tim is Lou and Amy's father, and Jack's ex-son-in-law. Lisa shows up to talk to Ben, and Jack invites her to stay for pancakes.