You are invited to the most exquisite butterfly birthday party of the year, but there is one giant problem. Fancy Nancy cannot go! Her friend Bree is throwing a spectacularly fancy butterfly bash, complete with gorgeous decorations and fluttering friends. Nancy is thrilled until she discovers her grandparents are celebrating their fiftieth anniversary on the exact same day. Nancy is absolutely furious, which is a fancy way of saying she is madder than mad. Missing out on the best party ever feels like the end of the world. Follow along with Nancy as she travels to her grandparents' celebration, pouting all the way. Will this fancy girl learn to overcome her massive disappointment and find a reason to smile? Find out in this relatable story about dealing with big feelings and discovering that family parties can be pretty glamorous, too.