With the heads of the Garrison and Reilly clans now captive, Avery discovers the key to negotiating a truce lies buried in the past, in the fiery wreckage of an Old West locomotive that derailed over a century ago. Thankfully, its spirit still whistles across the countryside. If only Avery can somehow manage a heist on a ghost train, there may be hope for the Heartland yet. • Series finale!