Our narrator, Dr. Atwood, goes into a long sleep (because of an experimental anesthetic) and wakes in 2180 where everyone is peaceful living under an autocratic government that forbids strong emotion and says no to the doctor marrying the nurse he falls in love with, at which point he is disintegrated and reawakens in his own time.

In an earlier story (“The Fitzgerald Contraction”), survivors of the sinking of Mu (or Mo, as they called it) travel into space at relativistic speeds only to return to Earth some 200,000 years later. That, of course, is mere time dilation rather than time travel; but in this sequel, the Moans along with present-day beauty Vayill continue even further into the Earth’s future where trouble ensues until Vayill’s aged father comes to the rescue with a real time machine in an airplane.

Widower Ezra Hubble hatches a scheme to deprive his stepson of an inheritance by taking the money with him to the future.