Zaheer, the leader of the Red Lotus and the main antagonist of Book 3, tortured Korra. The organization he led was the antithesis of the Order of the White Lotus, led by Iroh. Although she ...
After Korra’s battle with Zaheer at the end of Book Three, it took her three years to recover. Hence the big time jump heading into Book Four - which now looks to bring the epic journey full circle.