In Australia, siblings Jane Nartare Beaumont, Arnna Kathleen Beaumont, and Grant Ellis Beaumont, aged 9, 7, and 4, disappear from Glenelg Beach near Adelaide, and are never seen again. Witnesses claim to have spotted them in the company of a tall, blonde man, but over the years, after interviewing many potential suspects, police are unable generate enough solid leads to result in an arrest. The disappearances remain Australia’s most infamous cold case.