Ha Siheon was a genius investor who amassed a fortune of hundreds of billions of won on Wall Street. But right at the moment of his death from a rare disease that no amount of money could cure, he wakes up ten years in the past, back in his days as a Wall Street rookie. Realizing that developing a cure for his illness will require an astronomical amount of money, Siheon sets out to build a massive empire of wealth all over again just to survive…