Branded as traitors by the king's authorities, Crispin and his guardian, Bear, flee to coastal towns in fourteenth-century England, where they perform a musical juggling act and bond as a family after befriending a disfigured girl.

Avon the snail and Edward, a take-charge ant, set off together on a journey to an undetermined destination in search of unspecified adventures.

As Crispin tries to fulfill Bear's dream of moving to Iceland, he must leave Troth behind at a convent that needs a healer but, after falling in with thieves posing as musicians, he makes a new friend, Owen, and together they continue the arduous journey.