At age fourteen, she swam twenty-six miles from Catalina Island to the California mainland. At ages fifteen and sixteen, she broke the men's and women's world records for swimming the English Channel-a thirty-three-mile crossing in nine hours, thirty-six minutes. At eighteen, she swam the twenty-mile Cook Strait between North and South Islands of New Zealand, was caught on a massive swell, found herself after five hours farther from the finish than...

Twelve-year-old Tully's attempt to swim across Lake Tahoe after a heartbreaking loss and become the youngest person to complete the famous "Godfather" swim takes a dangerous turn, forcing her to choose between safety and a win that could change everything.