Miss Mallard is an avid gardener so she's delighted when the famous botanist Dr. Yang Ho Long Duck invites her to be his special guest at the Seoul Flower Festival. Willard is less than pleased because of his allergies, which turn out to be a blessing when Dr. Yang Ho Long Duck's newest orchid is stolen. Willard's allergies help solve a very pungent mystery, one that will allow the villain to take over the entire world thanks to the smell of just one orchid.