Four children. A locked apartment. A city that prided itself on safety-shattered forever.On the morning of January 6, 1979, four siblings-Tan Kok Peng, Tan Kok Hin, Tan Kok Soon, and Chin Nee-were found brutally murdered inside their Singapore flat. No forced entry. No witnesses. No answers.The killer vanished without a trace.And Singapore was forced to confront the unthinkable: that horror could strike even in a "perfect" city.This gripping true crime investigation reveals the chilling details behind one of Asia's most haunting unsolved cases. With forensic precision and emotional depth, each chapter unpacks: The Tan family's tragic final morningHow a sterilization policy shaped their futureInvestigative failures that let the killer walk freeTheories involving lost lottery tickets, tontine debts, and betrayalThe letter signed "The Murderer" that arrived after the funeralHow the crime shaped Singapore's silence-and its shadowsBased on original newspaper archives, witness accounts, and government records, this book invites readers to step into the narrow corridors of Geylang Bahru-and into the unanswered questions that still linger after 45 years.Perfect for readers of true crime, cold cases, Asian history, and anyone who believes some stories refuse to stay buried.If you believe every victim deserves a voice, and that some mysteries demand to be faced rather than forgotten-this story will stay with you long after the final page.