The start of the search for Zuko's mother, Ursa. Quite the little shocker at the end for Zuko. Told in flashbacks from the past with Ursa in her village through to her wedding and life in the palace. The flashbacks are interspersed with the team getting back together, sans Toph (I miss her so much) and with Azula. 
 Decent part 1. Looking forward to part 2. Extra points because it kept the girlchild enthralled from cover to cover.