In November 1970, the body of a woman was found in Isdalen Valley, in Norway. She was partially burned, and no documents were found to identify her. Her belongings shared a peculiar trait: labels had been removed, objects had been altered, and traces had been erased. The investigation revealed that she had traveled across Europe using multiple identities and routes that were deliberately difficult to trace. Despite the efforts of authorities, her name was never confirmed. In this episode, Case Zero reconstructs the known facts and the lines of investigation surrounding one of Europe's most persistent mysteries — a story that, more than fifty years later, remains unsolved.