S1, E3: In order to drum up business for Heartland, Lou is organizing an open house. Amy is totally against it. After all, she's managed to drum up some high profile clients on her own. Clients like Lisa Stillman, a well-known horse breeder who entrusts Amy with Promise, a very valuable horse who refuses to be saddled. But there's no way Lou can cancel, especially since she's secretly invited their father, Tim, to the open house to see Amy for the first time in ten years.