After several years at King Arthur's court, Terence, as Sir Gawain's squire and friend, accompanies him on a perilous quest that tests all their skills and whose successful completion could mean certain death for Gawain.

In medieval England, fourteen-year-old Terence finds his tranquil existence suddenly changed when he becomes the squire of the young Gawain of Orkney and accompanies him on a long quest, proving Gawain's worth as a knight and revealing an important secret about his own true identity.