On a storm-wracked island kingdom that worships the Thunder God Thor, Kael, an eighteen-year-old fisherman of impossible strength, awakens his bloodline when a monstrous Abyss Beast storms his city. Gripping the ancient axe Wavebreaker, he floods with lightning and slays the beast in a single blow.
Kael enlists with the elite Thunder Knights but can't control his power — it surges and slips away, burning him. Mocked as a nameless bastard by the noble Darian and his cold uncle Count Corwin, he is championed only by Corwin's daughter Lydia. Learning his father's secret — don't grip the lightning, become it — he masters his gift, but overloads and shatters the sacred Heart of Thunder. Commander Roderick covers it up and realizes the truth: Kael is the son of his old friend Thor, the Thunder God himself.
At Magnetite Peak, an ancient device confirms it — Thor took mortal form, loved Kael's mother Elin, then returned to the Abyss to seal the Void King and buy his family eighteen years of peace. When Corwin, a secret Void Church agent, triggers an attack, a Void Rift unleashes a Rift Beast on the arena. Kael slays it, and the Void King speaks into every mind: I have sealed your father away. Come and find me.
