The world's finest ruby was stolen from the bride of Prince Kassim's great-grandfather several generations ago in India by a marauding rajah. It's now several decades later and the British have conquered India, and one day the ruby shows up for sale by a wealthy London jeweler, Sir John Garnett. Garnett has his own problems--there have been a rash of thefts of his wife's jewels, and he hires a private detective named James Brett to investigate.

Wealthy George Hunter struggles to maintain his social-climbing wife and daughters' expensive lifestyle. After his, investments crash, he faces financial ruin and seeks help from a wealthy aunt, leading to various complications.

Upon his father’s death Jules Beaubien's is left a rich man but also one with a mission. Find his until now unknown half-sister, take her in and educate her. After investigating he discovers she has met a tragic fate after falling for a roue who had abandoned her. Swearing vengeance, he set off in a quest for justice in her name.