In the year 2149, the world is dying. The planet is overdeveloped and overcrowded, with the majority of plant and animal life extinct. The future of mankind is in jeopardy, and its only hope for survival is in the distant past. An ordinary family goes on an extraordinary journey back in time to prehistoric Earth as a part of a massive expedition to save the human race.

稀有书经销商阿波罗和他的妻子艾玛丶刚出生的儿子一直过着幸福的生活，唯一的问题是阿波罗经常做噩梦。有一天艾玛突然失踪，阿波罗去寻找她的旅程，以及这段旅程的结果，都十分引人入胜丶描绘动人。和拉维列早期的作品《银色的恶魔》（The Devil in Silver）丶《狂喜之人》（The Ecstatic）一样，他的这本新书也有着童话的意味，并将多种文学类型融合在一起，是一部带有恐怖元素的严肃文学作品。