When Mimi and Papa get invited to the most famous horse race in the world, Grant and Christina tag along. They meet up with a couple of horsy friends and start to have some fun! But then, mysterious things begin to happen: first a horse disappears, then two jockeys! The next thing you know, the kids are finding clues that may help them solve the mystery and save the race! But it's a two-minute race to the finish line! Come along and help them!