This article investigates the main aspects of the ontological problematics of A. B. Salnikov’s novel, focusing on the author’s conceptualization of the “constants of being’’ interpreted through the lens of idealist philosophy. The study identifies existential foundations that, as framed within the aesthetics of metamodernism, require renewal: the pursuit of consciously experiencing reality; the search of harmonious unity among beauty, goodness, and truth; preservation of the spiritual principle and connection with other people; the ability to shift from mundane to existential comprehension of reality; engagement with the culture of civilization; progression towards the divine; the ability for conscious self-sacrifice and forgiveness; and the maintenance of interpersonal development and harmonizing tendencies (“warmth”) sufficient for human continuation, conditioned by an unending struggle with the destructive (“murk”). The analysis was conducted with consideration of unique features of the novel’s artistic world, the context of the author’s oeuvre and the functions of intertextuality. The evolution of the character’s worldview systems is traced in relation to the key ontological categories.