This article, adopting a phenomenological approach and focusing on the fundamental concepts of Heidegger’s philosophy, provides an ontological analysis of a Khābnāmeh by Yaghma Jandaghi, centered on existential questions. It examines the representation of dream/death and being within the framework of Dasein’s experience. In Heideggerian philosophy, Dasein refers to the questioning being, continuously engaged in the pursuit of meaning and identity in relation to time, death, and other existential dimensions. In this study, dreams and sleep are considered not only as contexts for Dasein’s lived experience but also as liminal conditions between life and death, providing a field for the emergence of existential tensions. From a psychological and ontological perspective, these states offer an experience akin to a rupture from everyday life and an encounter with the most concealed aspects of human existence. Drawing on key Heideggerian concepts related to Dasein and fundamental ontology, such as “hiddenness,” “existential anxiety,” and “being-there/being-in-the-world,” the article demonstrates that dreams, conceived as death and as a figurative experience, position Dasein in a trajectory confronting the hidden dimensions of existence and self. Furthermore, Dasein’s internal conflicts during the processes of dreaming and waking reflect the fundamental tension between authentic and inauthentic possibilities of being, which can simultaneously be interpreted as a symbolic manifestation of the existential struggle between good and evil in Heidegger’s philosophy. Consequently, dreams in this work symbolically invite Dasein to confront truth, make existential choices, and recognize human limitations, thus facilitating a deeper understanding of being and human identity.