Tomona starts as a fisherman's son near Dan-no-ura's historic battle site, diving alongside his father to salvage relics from sunken Heike warships. Their discovery of a cursed sword for Ashikaga shogunate agents ends in catastrophe: unsheathing the blade bisects his father instantly while supernatural radiance blinds Tomona permanently. His father's ghost now haunts him, demanding answers and vengeance. Blind and lost, Tomona joins wandering blind monks who chant tales of the Heike's fall. Apprenticing under master Hasuichi, he sheds his past by renaming himself Tomoichi—a change that severs his ghostly father's pursuit. Though Tomoichi masters the biwa, artistic dissatisfaction lingers as he senses unresolved Heike spirits. Sightlessness reshapes his world: sounds manifest as swirling colors and textures, while scents and echoes reveal leaking rice or distant fires. His path shifts upon meeting Inu-Oh, a masked outcast deformed and shunned by society. Blindness lets Tomoichi bond without prejudice, uncovering Heike warrior ghosts clinging to Inu-Oh and craving their stories be told. Embracing this call, Tomoichi transforms into "Tomoari," partnering with Inu-Oh to create radical performances. Tomoari reinvents himself—growing long hair, donning flamboyant gender-fluid costumes with makeup and revealing fabrics, and channeling his biwa into aggressive rock-inspired styles featuring guitar-like shredding and pelvic thrusts. Traditionalists condemn his aesthetic as profane, comparing him to a prostitute. Their performances narrating the Heike ghosts' suppressed histories captivate crowds, pacify spirits, and trigger Inu-Oh's bodily metamorphosis. Yet their success threatens the Ashikaga shogunate's official chronicles. Ordered to conform, Tomoari refuses to mute his art or tame his transgressive presentation. Defiance costs him his head. Death binds his spirit to a ghostly biwa, now retelling his tale for centuries under his birth name, Tomona. After 600 years, he reunites with Inu-Oh's spirit: Inu-Oh restores Tomona's youth, and they perform together again. His identity shifts—Tomona to Tomoichi (monk) to Tomoari (performer) and back to Tomona (spirit)—each name marking a battle for artistic truth against society's chains.