While his father fights in the war for water, eleven-year-old Auden and his mother move to Cambridge, where Auden and his new friend Vivi discover his dead uncle's last, unfinished scientific achievement--a poetry-spouting robot seeking his purpose.
In a post-apocalyptic Great Britain, after her mother's death Serendipity, about twelve, leaves Lahn Dan and teams up with an orphan, Tab, hoping to find horses surviving somewhere.