Penny, a small kitten, dreams of becoming a fully trained ninja warrior and the book revolves around her adventures with her friends. Penny learns many lessons along the way through her training, but this time she is learning that some words are more magical than others. As her birthday approaches she needs to find out which magical word will unlock the secret to getting the birthday party she has always wanted. Penny makes a new friend who helps her find that magic word, as well as other words that are just as powerful.