Charley, a 31-year-old New Yorker, claims to have discovered a 'third level' at Grand Central Station — a gateway to the year 1894. Galesburg, Illinois of that year is peaceful, gas-lit, free from modern anxiety. His psychiatrist friend Sam dismisses it as 'waking-dream wish fulfillment' — escapism from the strain of contemporary life. Then Sam himself disappears, and Charley finds an 1894 letter addressed to him.