Alison hears scratching noises in the attic above her bed and persuades Gwyn to investigate. He finds stacks of dinner plates with a floral pattern. When he picks one up, something odd happens. He almost falls through the ceiling while simultaneously Roger, lounging by a large flat stone near the river, hears a scream and seems to see something flying through the air toward him. The stone is known as the Stone of Gronw. It has a hole neatly bored through it, and legend says that Lleu killed Gronw by throwing his spear clear through the stone that Gronw was holding to shield himself.