At the world's end, all love is timeless, and all age-old disputes irrelevant. Jherek Carnelian, however, is in danger of taking reality too seriously, and grows tired of his pleasures. Perhaps a hunt for aliens could lift his spirits? Or better yet, a journey through time? Ah, yes! The past! So complicated and strange - especially with its scarcity of time machines for a return trip! But regardless of the dangers, the past does hold one irresistible lure: Mrs Amelia Underwood, for whom the Hero at the End of Time risks all.