Suzy can't believe her luck when a secret invitation magically appears - the Impossible Postal Express is ready to ride again! But the celebrations don't last long when Trollville is hit by a terrible tremor, putting everyone in danger. With the city in peril, a race against time begins from the magical Cloud Forge to the Uncanny Valley to catch the villain behind this dastardly plan. Will the Impossible Postal Express help Suzy get some answers?