Swiss director Michael Koch has begun principal photography on his third feature, Erosion. Following his acclaimed sophomore feature, A Piece of Sky [+lee también:
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The drama follows Christian Andersen, a renowned Danish neurosurgeon whose life unravels after a failed operation results in the death of a young patient. Grappling with guilt and denial, he suffers a devastating personal blow when his own daughter goes missing. Determined to find her, he sets out on a journey into a primeval mountain world and into the depths of his own inner self. His desperate search leads him to the darkest and highest reaches of the Swiss Alps, where he must confront his responsibility, wrestle with guilt and suppression, and ultimately seek forgiveness in order to reclaim both his daughter and himself.

Academy Award nominee Peter Sarsgaard (The Lost Daughter [+lee también:
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Erosion is written by Koch. His early short Polar received a Special Mention at the Berlinale and won the German Short Film Award, while his debut feature, Marija [+lee también:
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Erosion is a Swiss-German co-production, staged by Christof Neracher for Zurich-based Hugofilm Features in co-production with Christoph Friedel and Claudia Steffen for Cologne-based Pandora Filmproduktion, SRF, SRG SSR and ARTE. The film is supported by the Swiss Federal Office of Culture (BAK), the Zurich Film Foundation, the Basel Film Fund, the Central Switzerland Film Fund, Suissimage, the Film- und Medienstiftung NRW, the German Federal Film Fund (DFFF) and WDR. Its world sales are handled by Polish outfit New Europe Film Sales, while distribution in Switzerland will be managed by DCM Film Distribution and in Germany by Pandora Film Verleih. A Swiss theatrical release is planned for autumn 2026.