In the land of Negatropolis, the Not twins--Can Not and Will Not--are supreme rulers and looking to take over the world with their negativity. Can and Will Not rule Negatropolis and have their eyes on the prize of Positivity City in order to create a world where everyone can't and won't change. Trying to overcome negative thinking and fixed mindsets, Yet and the Band of Believers set out to stop the evil Not twins from taking over the world. It's up to Yet to show that having a positive outlook is the best way to learn and think. Can Yet and the Band of Believers defeat the Evil Not twins and restore growth mindsets to the citizens of the world?