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Delves into the realities of an aging society and centers on Ye Xiaolin – a former killer turned caregiver. She infiltrates and kills seniors under the guise of offering care, but her life takes an unexpected turn after a chance encounter with zookeeper Ma Deyong. As their fates become entangled and detective Zhou Ping begins to investigate the string of murders, a gripping story unfolds. The film raises awareness of aging-related societal issues by focusing on the themes of death, family dynamics, and the dignity of aging.