It was a warm summer morning on January 26, 1966, when the three Beaumont children left their suburban home to celebrate Australia Day at the beach. The children regularly made the trip by themselves, so their mother felt at ease providing them with bus fare and sending them on their way while she visited and had lunch with a close friend. However, she would return home that afternoon to find that the children still had not returned. That morning would end up being the last time she saw her three children. The case would remain a mystery for over fifty years as different serial killers would claim responsibility for the disappearance.