"Suite Precure" is the eighth installment in the Pretty Cure franchise, featuring a musical theme that intertwines with its narrative and character dynamics. The story is set in the fictional city of Kanon, where music plays a central role in daily life. The series introduces Hibiki Hojo and Kanade Minamino, two middle school girls with contrasting personalities who become the titular Pretty Cure warriors, Cure Melody and Cure Rhythm. Their mission is to protect the world from the evil organization Noise, which seeks to spread discord and silence by stealing the Melody of Happiness, a magical musical score that maintains harmony.

The conflict begins when Noise targets the Major Land, a magical kingdom connected to the human world through music. The kingdom's princess, Siren, is transformed into a fairy named Hummy and sent to the human world to seek the Pretty Cure warriors. Hibiki and Kanade are chosen to wield the power of Cure, using their abilities to combat Noise's minions, the Mephisto, and restore the stolen melodies. Their transformation items, the Melody Tact and the Rhythm Tact, allow them to perform musical attacks and purify corrupted melodies.

As the story progresses, the duo is joined by Ako Shirabe, a young girl who becomes Cure Beat, adding a third member to the team. Ako's transformation item, the Beat Tact, enhances the group's abilities and introduces a new dynamic to their battles. The trio faces increasingly powerful enemies, including the Noise Trio—Bassdrum, Baritone, and Falsetto—who serve as recurring antagonists. The narrative explores themes of teamwork, friendship, and the transformative power of music, with each character contributing unique strengths and overcoming personal challenges.

The climax of the series involves a confrontation with Noise's leader, Mephisto, and the ultimate goal of restoring the Melody of Happiness. The Pretty Cure warriors must unite their powers and harness the strength of their bonds to defeat Noise and bring harmony back to both the human world and Major Land. The series concludes with a resolution that emphasizes the enduring importance of music and the connections it fosters.