The circus Big Top is coming with the most daring acts ever performed... And a lot of trouble! Kate, Anders, and Erik are the first to see the huge poster that boldly proclaims the circus is coming to River Falls, Wisconsin. "Rare Wild Animals. Three Big Rings. Two Gigantic Shows Daily. Free Street Parade." Just the sight of the majestic animals is a thrill! Then Kate and Anders discover their whole family is going to the circus. They will stay with Sarah Livingston, Kat's best friend from Minneapolis. even Michael Reilly, who has always liked Kate, will be there! But in the excitement lurks the dark new of accidents that have followed a circus star, the Great Roberto. Why is someone trying to hurt him? What is the secret of the diamonds, and who is the runaway clown? What danger follows not only the circus people, but also Kate and Tina? And why will Kate need to make a life-changing choice?