Calland's equipment works as intended, he and Kay are sent back to the 20th century, and into bodies of the correct gender. Calland finds himself in the body of a successful young man, with an attractive fiancée which he is soon to marry. But going to the rendezvous with Kay at Trafalgar Square, he is shocked to discover the flaw in his plan – Kay's personality had been displaced into the body of an old, ill woman.