Katie Ledecky has won more individual Olympic races than any female swimmer in history. She is a three-time Olympian, a seven-time gold medalist, a twenty-one-time world champion, eight-time NCAA Champion, and a world record-holder. Now, she shares what it takes to compete at an elite level. Just Add Water charts how Ledecky developed a champion's mindset that has allowed her to persevere under intense pressure and how she has maintained her dominance in a sport where success depends on milliseconds. In the end, Katie's story is about testing yourself against the difficult, and seeing who you become on the other side.