The Mighty Math Adventure is an origin story of Team Umizoomi.
Milli and Geo are sent to Umi City to live under temporary care. Along the way, the sibiling encounter a robot named Bot and a villian name Machiro whose determined to turn Umi City into his own personal kingdom. When Machiro kidnaps the children, it's up to Bot to save them.
- This episode shows how Team Umizoomi formed.