First, she went on a quest to Boreth to find her mother. After going on a quest in the harsh environment of Boreth, she found her mom, who then proceeded to get killed by a wild animal. (Yeah, a bit of an anti-climax.)
Then Tom and Miral moved to Boreth to join Belanna, who was studying ancient scrolls about the Kuva'magh, whom the Klingons in the DQ believed to be young Miral.
Tom went back to Voyager as XO, leaving Belanna and Miral on Boreth. When last we heard, Be'lanna had made a significant discovery in the scrolls about her daughter, and then she recieved an anonymous warning about a threat to Miral's life.
To be continued...