A wizard named Merlina, granddaughter of Merlin, attempts to flee from a black knight and his forces. Cornered, she performs a spell calling forth a champion to save her, summoning Sonic the Hedgehog. As they retreat, Merlina explains to Sonic that the black knight is actually King Arthur, who has been corrupted by the immortality granted by Excalibur's scabbard, and that Sonic must defeat him to restore peace to the kingdom. With Sonic's speed alone being insufficient to defeat the King,