Rainbow Tinseltail and the other students at Sparklegrove School for Unicorns are excited when a brand new unicorn, Sunny Huckleberry, enters the school, but Sunny does not know what his special magical power is, and the thought that he might not have any power at all is making him unhappy; Rainbow (whose power is granting wishes) is eager to help him--even though he does not seem to want her help.

Eva Wingdale and her class are excited about their trip to Poppy's Pumpkin Farm, where every year, there is one very large, extra special, thank-you pumpkin. But on the second day of the visit the owls find that the Thank-you Pumpkin has gone missing, and the farm animals are in an uproar--so Eva and the other owls turn detective to solve the mystery of the missing pumpkin.