Nozomi Yumehara chases a mysterious butterfly and meets a mysterious man named Kouji Kokoda, who is actually the fairy Coco. She follows him into the library and finds the Dream Collet on the bookshelf.
Nozomi and Rin meet with Urara Kasugano, who is curious about the Pretty Cure. Nozomi decides to skip class to spend extra time with Urara, who later gains the power to become Cure Lemonade.
Coco informs Nozomi, Rin and Urara that they have to find the last two Cures. Meanwhile, Komachi Akimoto and Karen Minazuki, who suspect that the three are causing strange events at the school, try to question them.
The Cures believe that Karen could be the last Pretty Cure, but she is reluctant to become a Cure. When the blue butterfly appears before her, it disappears and she is unable to become a Cure.
When Nozomi is unable to concentrate on her studies even with the help of Karen and Komachi, the Cures try to motivate her, but their efforts upset her. Coco takes it upon himself to show Nozomi the potential he sees in her.
Rin has been helping several sports teams and agreed to play with them all, but after learning they are all playing on the same day, must decide which club to join.
Komachi is almost finished with her first novel. While everyone else enjoys and praises the story, Nuts' attempt at constructive criticism upsets her and makes her consider giving up writing.
Nozomi encounters a mysterious creature named Milk, who causes trouble after eating her lunch. After meeting Coco and Nuts, Milk reveals that she was their caretaker back in the Palmier Kingdom.
When one of Nozomi and Milk's arguments goes too far and shatters a bead butterfly the Cures had dedicated themselves to making, they get into an argument and split up.
The Cures decide to go to a resort together and shop for supplies, and Rin struggles to keep order as they try to buy things she considers unnecessary.
Komachi tells everyone a scary story about Count Rosett, who died from illness while waiting for his lover to return, but was unaware that she had died in an accident.
The Cures are thinking about what to serve during the festival. Komachi comes up with an original treat to serve, but after Nightmare unexpectedly eats all their ice, she must find an alternative with help from Karen.
Summer is coming to an end and Nozomi still has not finished her summer project. Urara offers to let Nozomi come with her to her idol work to give her ideas.
During one of their fights, Milk tells Nozomi she is not worthy to be a Pretty Cure, causing her to break away from the other Cures. Without Nozomi, they struggle to fight against a Nightmare.
The best friend of Komachi's sister is getting married. After seeing a bracelet that Rin designed, the bride asks Rin to design and make a crown for her, but Rin wonders if she is worthy of making something so important.
Mika is struggling with her latest newspapers. After learning that some of the articles were not properly researched, Rin is upset about what Mika wrote about the soccer captain.
Nozomi and Rin are both competing in a school relay race. Since Nozomi is exhausted from Rin's practice and training, the Cures join the relay to encourage her, but when Nightmare attacks, it threatens to disrupt the relay.
Milk writes a story based on Cinderella about the Cures, but is annoyed by them trying to read it while she writes. As she finds a quieter place to complete her story, Nightmare captures her and turns her story into a reality.
Since there is no school, the Cures are doing their own thing. When Nozomi reveals that she has found a Pinky, Coco struggles with his feelings for her and the fact that he will have to leave her one day.
Urara is auditioning for a play, but has to improvise for the final scene where her character says goodbye to the boy she loves. Urara finally settles on "I cannot say goodbye," and everyone applauds the line.
The Cures are decorating the Nuts House for Christmas when Nozomi realizes that they have forgotten the flowers. She decides that Karen, who loves flowers, and Rin, whose family owns a flower shop, are perfect for the job.
Komachi had decided with Urara that it would be best to end her latest novel with a quiet understanding between the romantic leads, but she begins to wonder if this is really the best ending.
Christmas is approaching and there is only one Pinky left to find. Nozomi suddenly realizes that Coco, Nuts and Milk will be returning home soon, but tries to act normal. However, Coco notices that something is wrong and confronts her.
On New Year's Day, the Cures visit a temple for the New Year's prayer. On their way home, Nozomi finds the last Pinky sitting on her shoulder, but then Bloody attacks.
Despariah has used the Dream Collet to attain eternal youth and life, causing the Dream Collet to lose its power. However, the Cures refuse to give up.
