Spinach hates having her own cage in the animal shelter. It's so boring! She wants to pounce on crinkly balls, chase ribbons, and climb up scratchers with the four feisty kittens that live beside her. But Spinach is sick, so she has to watch from the sidelines.

Then Spinach is taken to the vet's office, where they fix her right up. Now, she can jump, pounce, and play! The old tomcat at the vet's said she'd have to be a superhero to get through the procedure so...that must mean she now has superpowers!

Super Spinach is taken to Fosterland, where she gets her own sidekick, a roly-poly kitten named Chickpea, and a superhero uniform that she believes gives her the special powers. But when her super suit is taken away, will Super Spinach still be able to save the day?