When Otta and Erl are banished from their village for angering the gods, they embark on a peculiar quest.
Commanded by a wandering god, Otta is obliged to follow the strange, elusive “unicorn's trail.” Her twin brother, Erl, has lost his memory and is struggling to discover who he is.
As they travel further from the shelter of the Homestead, the siblings discover unpleasant traits in their personalities. They must learn to adapt and change before they are driven apart.
Who is the wandering god? Just what is the “unicorn's trail” and where will it lead? What are the kaerlings? And who are the brown-robed travellers that trespass in Otta's dreams?