The 20th century of human history was overshadowed by the horrifying events of world wars and totalitarian regimes, with their traumatic experiences becoming the very focus of today’s modern globalized society. Psychoanalytic psychotherapy is one of the ways of dealing with this overwhelmingly violent phenomenon. This article will discuss an historical traumatic event through literature, using psychoanalytic theories of trauma. The problem is discussed on the level of the actual theoretical landscape including the relation between transgenerational transmitted trauma, collective trauma, and cumulative trauma inscribed in a “foundation matrix” (Foulkes). As a clinical vignette, the novel “Museum of Abandoned Secrets” by modern Ukrainian writer Oksana Zabuzhko is used. The author addresses the functions of dreams, scrutinizing the psychodynamics of the novel using concepts of projective identification, mourning, the need for repair, and epigenetic and fractal theory. It is suggested that the novel facilitates the characters’ journey through trauma and its integration by the large groups (of readers).