"While exploring a remote part of Whale Island for a class project, the Thea Sisters stumble on a group of researchers studying migrating butterflies. Eager to learn more about the beautiful creatures, the mice volunteer as assistants. But when a TV crew shows up unexpectedly, there's drama in the camp! the butterflies may be in danger, and it's up to the Thea Sisters to protect them. It's a colorful adventure they'll never forget!"--back cover.