the floating kingdom ( attack on titan )

humanity is thought to be near extinction the only know survivors are those that said to live in three sets of wall the first one is called wall maria the next one after that called wall rose and last one is where the king and nobles like wall sina but ever since the appearance of the colossal titan along with the armed one they lost wall maria it had been five years since then now word had spread about there being titan shifter what will happen when a girl pops up out of nowhere and clams to be from another humans kingdom that has been fighting the titans too just what dos she want and who could she be read and find out