In view of his agonizing friends, Percival is wrapped in a strange negative energy. Prince Tristan, who has just returned to Liones, will save him from this critical state. With his friend Lancelot and Gawain, the mysterious knight he brought back with him, the Four Knights of the Apocalypse are finally to the full! At least, that's what they thought because Gawain has disappeared... The prophecy is about to be fulfilled. The chaos is coming. Will the heroic meeting of the four Horsemen be a blessing, or is it all the contrary?