The enduring impacts of colonisation manifest as historical trauma, unresolved grief and cultural disconnection. These foundational outcomes of complex trauma in Māori family, tribal and community contexts pose a specific set of challenges and opportunities for therapeutic approaches that address trauma from the source. This workshop provides a practical analysis of historical trauma trajectories and healing trajectories within Ngāi Tāhu. The historical trauma narratives are shared in story-telling format recounting public and private whakapapa/kinship based narratives from the direct descendants of chiefly lines, Paramount Chief Big William or Wi Harihona Puhirere/Wi Karaweko and Paramount Chief Big Mary/Mere Whariu Puhirere. This is the story of trauma that traverses generations of their descendants and will present an analysis of how trauma manifests in current generations of Ngāi Tārewa (the tribal group) from the area known as Te Pataka ō Rākaihautu/Banks Peninsula. Local narratives will be considered in context of international theory-building on the outcomes of historical trauma in other indigenous populations; the challenges these histories pose for Western trained clinicians and offer advice for participants about working with historical trauma whether professionally trained or not. A process of Kōrero Tahi or speaking in one voice will be introduced as part of this workshop and reference made to other indigenous approaches to working with historical trauma from a cultural base.