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The documentary centers on the work of Leiden professor Bastiaans, who specializes in treating war victims. Van Gasteren captures the psychotherapeutic treatment involving LSD administered to Joop, a former concentration camp prisoner, showcasing the profound impact of war on the psyche. Joop's journey from imprisonment to liberation, followed by his struggles with trauma, is depicted through a raw and intimate lens.

The film features approximately six and a half hours of recorded therapy sessions, meticulously edited down to over an hour. Van Gasteren's focus on minute details, such as Joop's hands and emotional expressions, adds depth to the viewing experience. This documentary not only sheds light on the effects of World War II but also emphasizes the therapeutic process of healing from trauma, making it a significant work in the genre of documentary filmmaking.