Shimada, a former Self-Defense Force member, suffers from severe PTSD following the loss of a comrade in a firefight in war-torn South Sudan, a tragedy covered up by the government. Shining a light into Shimada's solitary life in illegal arms manufacturing is a job as an apprentice at a traditional Japanese fireworks factory. There he begins crafting fireworks alongside the master artisan and fellow craftsmen who embrace fireworks that illuminate people's peaceful lives. Yet, parallel to Shimada's journey, his comrades-in-arms with unresolved feelings team up on radical acts to expose the government's cover-up, escalating tensions and pulling Shimada back into the darkness he thought he'd left behind.
Kyoko was born and raised in Mishima City, a place built on the lava flow of Mt. Fuji. As her family's shoe store closes, she feels adrift, losing her sense of belonging. Her older sister Asuka, who worries about Kyoko, also harbors a different kind of anxiety. In the background, the traditional festival music "shagiri" resonates throughout the town.
Yuka, a female college student, is obsessed with delusions of herself being raped and is unable to go to university. She cannot escape the feeling of intimidation that the men around her are attacking her. Her mother, Kikumi, sends her Yuka to her psychoanalyst, Kurahata. Based on what Yuka says, Kurahata deduces that the biggest cause of Yuka's mental imbalance is likely to be her conflict with her mother, Kikumi. Kikumi is flashy and stands out no matter where she is, and apparently she has taken Yuka's first love, Kunisaka, a masculine schoolteacher, as her mistress...