Cassandra’s ending explains how the titular character, who was once a very loving and caring mother, eventually became a psychotic robot. The answer lies in Cassandra’s past, which revealed that her patriarchal husband was nothing less than evil, and not only turned his wife into a monster but also destroyed his entire family. [Spoiler Alert] It all started when Cassandra got pregnant for the second time, and Horst decided to check the baby’s gender, as he was too embarrassed to raise a girl. In his Obb lab, Horst had developed an ultrasound alternative called the vertical sound, which he tested on his wife without telling her about its harmful consequences. The radiation from the scanner not only affected Cassandra’s womb but her entire body. She developed tumors in each and every organ and gave birth to a deformed girl just because Horst was ashamed of becoming a father to a girl.