RL 5 ; 009-012 Ax and the Animorphs have a huge problem when they decide to morph mosquitos to slip by some Yeerks. They end up stuck in Zero-space with no idea how they got there, no way to get back to Earth .. and no oxygen.

Visser Four has found the Time Matrix, the machine Elfanfor had hidden, and he plans to use it to become Visser One.

The Animorphs need a break from the superhero stuff and everything should have been cool. But Rachel is missing and something is after the kids.