Princess Lily loses her giggle to a grumpy dragon, turning her colorful kingdom glum. With the help of a bouncy bunny, Happy Boop, and a joke-telling bear, Bubbles the Funny, she ventures to recover her lost laugh. Through silly jokes and kind gestures, they teach the dragon, Grumbles, the joy of laughter, restoring happiness to their land and discovering that everyone, even the grumpiest, can find joy.