Gaspard is the last man on Earth. Zeria, his grandson, is the first human to be born on Mars. Gaspard tells him about his life, his fears and his loves in the hope that Zeria will come to see him before he dies. Zeria would be the first human being to return to Earth without having ever known it.

In the near future, during a health crisis, novelist Clarissa Katsef visits the Ludovico Foundation housing complex in search of inspiration. With the help of her AI assistant Dalloway, she finds fresh inspiration as she immerses herself in her writing.