After a suicide attempt, writer Marcos Aguirre is admitted to a psychiatric hospital. His only companion is Julieta, his deceased wife, whose voice haunts him constantly. As treatment begins to silence her, strange signs emerge, leading Marcos to believe that perhaps Julieta is not just a hallucination. Confronted with his madness, his guilt, and an unfinished book, Marcos embarks on a journey through doubt, loss, and fragile connections, seeking to heal, to leave the moon behind, and to return to life on Earth.