As Percival turns sixteen, his grandfather tells him about the big world beyond their far-flung home - but the young man seems more interested in dinner.

On a journey to find his estranged father, Percival comes across a group of traveling performers who give him a lift to the nearest village.

Although Percival puts up a good fight, the black knight hasn't unleashed his full powers yet. Suddenly, a mysterious red fox appears.

Percival wakes up to find himself tied up and experimented on. His captor tells him that he's almost perfected the medicine he's been developing.

To return his grandfather to his original form, Nasiens will have to defeat another Holy Knight, and Percival is determined to help.

Percival and his friends come across a fierce young woman named Anne who, against her father's will, dreams of becoming a Holy Knight.

Although Ironside completely overpowers them, Percival, Anne and Nasiens put up a brave fight. But Donny is nowhere to be seen.

Although Percival is mortally injured, he is awakened by the magical power "Hope" that transforms the feelings of his friends into power. Meanwhile, Shin struggles to fend off the dead who are approaching the people of the city. Elonsid does everything possible to stop Percival from interfering with the ritual. However, Percival and his friends are also thinking of a strategy to counter Elonsid...

The group — now joined by an exuberant Anne — make a stop in the rough town of Cant, where Donny has an awkward family reunion.

While held captive, Howzer, Nasiens and the others find out that Edlin has stolen a dragon's egg, putting the whole town in danger.

As Percival, Donny and Anne have their hands full trying to stop the rampaging dragon, the still drunk Howzer asks Nasiens to sober him up.

The girl, Guinevere, demonstrates complete familiarity with Lancelot despite just meeting him, and informs him of where he will find Gawain. Meanwhile, Chion sneaks away to assassinate Gawain, paranoid towards the prophecied knights besides Tristan. Alerted to Chion's intentions by Anne, Tristan stops him from killing a figure wearing Gawain's armor, whom they discover to be an unrelated man who found Gawain's suit discarded and donned it on a whim. Elsewhere, Percival's group meets an unarmored man they suspect to be Gawain until Percival recognizes him as an unmasked Pellegarde, who has followed Percival from the Entangled Forest. The two resume their battle, which disrupts a muscular young woman's attempt to court Isolde. Agitated, the woman extinguishes Pellegarde's magic flames with her power of sunlight, revealing herself as Gawain. Tristan and Lancelot assemble with Percival and Gawain in the commotion, completing the Four Knights of the Apocalypse.