When John Midas acquires a magical gift, everything his lips touch turns into chocolate.

Cass finds herself alone and disoriented in a dream-like world, while back at home she is in the hospital in a coma with Max-Ernest desperately searching for a way to awaken her.

Twelve-year-old Coco Hidden has grown up in her mother's chocolate shop in Colorado, along with her friend Leo de la Cueva, but recently things have not been going well; the shop is failing, and Leo is hanging out with the other boys, and barely wants to talk to her--but when they both win a culinary contest, the two children and their mothers find themselves on a trip to the Amazon in Ecuador, where Coco hopes to find the rare ceiba tree, and where...

If Mason and Hannah can win first prize at the annual Chocolate Expo, they may be able to save their parents' shop. When Cocoa, the candy-crazy Labrador enters the kitchen, the children may have more trouble than they can handle.

Cass's mom is kidnapped by the evil dessert chef, Señor Hugo, who requests the legendary tuning fork as ransom, leading Cass and Max-Ernest to try finding the magical instrument in time.