Plot summary
As Korra reunites with her friends in Republic City, Wu is abducted on Kuvira's orders. Korra, Asami, and Mako rescue him from a train and hide him with Mako's family in Asami's mansion. Meanwhile, Bolin and Varrick encounter escapees from Kuvira's prison camps, which now house anyone not of Earth Kingdom blood, and help them escape from the now walled-in Empire. In the swamp, Kuvira's forces begins harvesting the spirit tree's vines.
Credits
Adapted from Wikipedia contributors, The Legend of Korra season 4. HTML formatting and reference markers removed.