Amy must help a skeptical performer, and her pair of matched liberty horses work together again; Instead of thinking about possibly retiring, Jack unexpectedly buys Mitch’s herd of cattle; Lyndy asks Amy’s client for help with a special surprise for Amy’s birthday; Tim returns from his trip with a surprise for everyone. A wild stallion escapes from Sam’s ranch during a burglary and Amy will stop at nothing to find him; Lisa’s latest business investment is at risk; Tim and Jessica adjust to life back at Heartland.