"The Moonstone" is a twists and turns of the story caused by a huge diamond, which has been inlaid in the India moon god forehead for a hundred years. Because the color is like the moon, and the moonlight is changed by the gloss of the moon, it is so called "The Moonstone". According to the will of the God, it has been protected by three Brahmin, God also predicted that, who took the diamond, the disaster will fall on his head. Early in the eighteenth Century, the moonstone was robbed, then fell to the British army officer's hands. After he presented it to his niece as a birthday gift, the diamond suddenly disappeared. After many setbacks, the case is entirely cleared. The moonstone finally came back to the moon god forehead...... The novel conception is exquisite, and the plot twists and turns, it is with suspense and exciting. Outcome beyonds all expectations, but proves conclusive, reasonable, impressive. "The Moonstone" is representative of the British novel and knowns as the originator of modern detective novel in the works of Collins, and the first one of the longest and most excellent modern detective novel.