Sakura Uta is a second-year middle schooler who loves to sing. While out walking her dog, she meets Purirun, a cute fairy searching for the Legendary Protectors known as Idol Precure. Purirun's home, KirakiLand, was once a bright and sparkling place, but Darkine, the leader of the Chokkiri Gang, has plunged it into darkness. Uta agrees to help Purirun look for cheerful, happy people who could become Precure and bring the light back. When the Chokkiri Gang shows up in Uta's hometown of Hanamichi Town and starts stealing the townspeople's sparkles, she resolves to light up the gloom with her song. She gains the power to transform into Cure Idol, fighting with singing, dancing and crowd-pleasing performance. The series is a magical girl action fantasy built around music.