Five years after India gained independence, chaos erupted on a moving train when a dead body was discovered in an overcrowded compartment. The clothes suggested the victim was a wealthy individual, but the head had been severed—making identification nearly impossible. In an era when forensic investigation was still a major challenge, Inspector Iyer began his inquiry right there on the moving train. But will he be able to uncover the truth? And why is this case known as the first murder mystery of independent India?