The Mabinogion in MasterplotsMabinogion, The“Pwyll, Prince of Dyved.” Pwyll, the prince of Dyved, is caught stealing a dying deer. In order to redeem himself, Pwyll agrees to exchange lands and appearances with the chieftain who has caught him and to slay the chieftain’s enemy after a year’s time. During that year, each prince rules the other’s land wisely and well, and each remains faithful to his own true wife.