Skeletons in the Closet

After Amon and The Equalists have overtaken Republic City, the future seems a lot bleaker for Korra and her friends, having to hide in the underground without being able to do anything but wait for the United Forces to come take back the city.
As the United Forces roll into Republic City by sea, General Iroh is bewildered by the lack of resistance as they come into the harbor. His bewilderment is replaced by shock as he discovers a new weapon that The Equalists have developed, which decimates his fleet.
The General is lucky to have Korra save him, and after recovering, they plot together to hatch a plan to stop Amon in his tracks. As they set out to put this plan into action, the young Avatar learns a unexpected secret about the leader of The Equalists from an old acquaintance.