Twelve-year-old Misty and her mother have just moved from Trinidad to Brooklyn, New York, in time for the annual carnival celebrations over Labor Day weekend. Misty has plenty to deal with getting used to living with her cousins Aiden and Brooke in her new surroundings. On top of that, her mom is too busy trying to find a job and her aunts and uncles are too preoccupied with carnival preparations to pay any attention to her. Then really strange things begin to happen. A ball of feathers in the basement turns into a creature that squeaks and rolls around. When Misty and her cousins eat pieces of mango anchar, flames shoot out of their mouths. Most disturbing of all, Misty begins to see visions of the future--scary visions that soon come true. Misty discovers that she and her cousins come from a long line of mokos, people who have special powers meant to help them protect their community. Misty can see impending danger, Aiden can heal, and Brooke has crazy physical strength. The trio is just learning about their skills when Misty senses something watching her. And then each of the carnival events is disrupted by a different disaster. Some kind of evil force is clearly trying to stop the festivities. But why? And will moko magic be enough to save the day?