Mistletoe takes care of an injured bird from the forest, but it ends up dead the following morning. After Papa Bramble tells him what happened, the young rabbit goes on an adventure in search of his deceased friend.
A love fragrance makes Periwinkle attracted to the perfumer's granddaughter, Clara, and his neighbor Pimpernelle, at the same time. Now, with Aunt Zinnia's help, the little bunny must make a tough decision over whom he truly loves.
The Bellflowers are delighted at Poppy's performance on a violin he bought from a flea market; Mistletoe wants to prove he can play it better than his brother. But when the instrument is broken, it will lead both on a dangerous quest through a marsh to find its maker.
A car accident lands a restaurant critic close to the Bellflower home; impressed by Aunt Zinnia's cooking skills, he persuades the rabbits to open their own establishment. Though hoping to help his family out, Periwinkle gets left behind with rats who eventually force him to make their meals.
Poppy discovers a well-preserved fossil of a species known as the Lapinosaurus and informs Ernest Babine about it, while the young rabbits spend another winter at Theo's. However, it soon disappears from their sight when the creature comes to life.
Poppy awaits the return of his girlfriend, whom he first met while investigating a robbery in Beechwood Grove, and plans to show her a moon rocket he just made. But then, he grows jealous because of her stepbrother guest, Norbert.