The window depicts the story of St Egwin, Bishop of Worcester, circa 700. He went on a pilgrimage to Rome, and prepared for his journey by locking shackles on his feet, throwing the key into the River Avon as he departed. Whilst he was praying in Rome one of his servants bought him fish to eat, and on preparing the fish the key he had thrown in the River Avon was found and he released himself. On his return to England, he founded Evesham Abbey.