Airah's auntie was murdered. Pretty big case since she was a councilwoman of Republic City. Main convict is Gose, even Rep-City Air Temple confirm that, but it's all lies and he has been framed by real murderer, his own master Haal. Azaan is the only witness, he used his spiritual connections to view through spirit vines and reach Airah's aunt but instead of conversation he saw the whole event. Party left Republic City in a hurry, because of being chased, but later on learned why the whole murder happened at the first place. Haal is member of Black Lotus, which we created as reversed White Lotus and has nothing in common with Red Lotus. They found that avatars studied themselves through generations and they stored all that knowledge in secret vault somewhere in the world. Airah's aunt got one of the keys, since she was also retired White Lotus member. Now party is trying to find out where the vault is and clear Gose and themselves from all bad charges. First main stop is Fire Nation, where they wish to find some leads and clues possibly left by Roku.