Yoo-Mi Lee’s family moved from Korea to Uganda. Six years later they immigrated to the Bronx. She was 12. Graduating from Cornell, she ended up by happenstance on Wall Street. Executing trades, glued to three video screens, working three phones and keeping up with the ticker tape, she was headed for a seat at George Soros’ currency desk. Then she walked away from the world of Big Money. “I decided to give my time away. I thought I’d just feel so much better,” says Yoo-Mi Lee. Read on for the story of a woman who made some very unusual choices — and our world is the better for them.