In a near-future Paris reshaped by climate urgency, environmental engineer Diane Griffith draws on innovations in vertical agriculture to help design an ambitious model of green urban life meant to heal both city and planet. As the project transforms Paris's historic core, unanswered questions arise - about care, responsibility, and what sustainable progress truly requires. The search for her missing activist sister forces Diane to engage with those questions. Told alongside the future perspective of her niece Lou, who must live with and fight within Diane's legacy, The Hunger of Those Who Built It asks who gets to inherit tomorrow's utopia.