The "Today" co-anchor shares the inspiring stories of people who found their life's purpose in unexpected ways, from a Wall Street investment banker-turned-minister to a blue-collar woman who attended Harvard Medical School.

"A collection of David vs. Goliath stories"-- "After her acclaimed memoir, Always Sunny, Janice Dean figured she was done trying to survive or bring down awful men. Then she found herself taking on Governor Andrew Cuomo on social media and then at rallies. What at first seemed like a futile fight ended with Cuomo's historic resignation. But it caused Janice to wonder: What fuels someone's resolve to go up against a powerful opponent? And how can...