When Ivan, a gorilla who has lived for years in a down-and-out circus-themed mall, meets Ruby, a baby elephant that has been added to the mall, he decides that he must find her a better life.

In this novel-in-verse that picks up a few months after the events of The One and Only Bob, Ruby recounts her life before the circus when her caretaker from the elephant orphanage in Africa comes for a visit. Ruby's story picks up a few months after the events of The One and Only Bob . Now living in a wildlife sanctuary, Ruby's caretaker from the elephant orphanage in Africa where she grew up is visiting. Seeing him again brings back a flood of memories...

Cassie is tired of battles and of being an Animorph, and decides that she just can't do it anymore. So she quits. But that's not the worst that's happended. A human-Controller followed Cassie after the last run-in with the Yeerks. And she knows that Cassie is an Andalite ... or human.

Having learned that someone has discovered proof of alien life and hidden the proof on the top-secret base called Zone 91, Cassie and the Animorphs struggle to keep the evil Yeerks away from the place.