India. 1799. Colonel Herncastle unexpectedly finds a rare diamond. It was situated in a head of Hindu god statue. Colonel wanted to give this diamond to his niece, Miss Rachel Verinder, as a gift. And his desire realized but only after he has gone to another world. Rachel got a diamond as a birthday present from her old friend Franklin Blake. There was a birthday party with 9 quests. Everything was fine until the next morning. When Rachel woke up, she found out the diamond was stolen. But who dared to do such an awful thing?