In the aftermath of Cozy Glow's defeat, all seems well in Ponyville. But then the shocking news is given that the line from Ponyville to Canterlot is to be closed. The Young 6 will not have this, and make a bid to save the line and run it themselves. But local opposition, sabotage, and crime will push their friendships with each other to the very limit.

Based on the Ealing Classic, 'the Titfield Thunderbolt'. Takes place between seasons 8 and 9, and was written before 'She's all Yak' aired.