"Healin' Good Precure" is a magical girl anime that centers around the efforts of a group of young girls to protect the Earth from environmental destruction caused by malevolent forces. The story begins when Nodoka Hanadera, a reserved and kind-hearted girl recovering from a long illness, moves to a new town. Her life takes a dramatic turn when she encounters two fairy-like creatures, Latte and Rabirin, who are part of the Healing Garden, a mystical world that maintains the balance of nature on Earth. Nodoka is chosen to become a Precure, a warrior tasked with defending the planet from the Byogen Kingdom, an organization that seeks to spread disease and corruption by infecting living beings with harmful bacteria called Byogens.

Nodoka transforms into Cure Grace, gaining the power to heal and purify the infected. She is soon joined by two other girls: Chiyu Sawaizumi, a confident and athletic swimmer who becomes Cure Fontaine, and Hinata Hiramitsu, a cheerful and creative artist who becomes Cure Sparkle. Together, the trio forms the Healin' Good Precure team, working alongside their fairy partners—Rabirin, Pegitan, and Nyatoran—to combat the Byogen Kingdom's generals: Shindoine, Daruizen, and Guaiwaru. Each of these antagonists represents a different aspect of disease and environmental harm, and their attacks often manifest as monstrous creatures called Megabyogen, which the Precure must purify.

As the series progresses, the Precure face increasingly challenging battles while also navigating their personal lives and relationships. Nodoka struggles with her past illness and the fear of being a burden to others, Chiyu grapples with balancing her responsibilities as a swimmer and a Precure, and Hinata learns to channel her creativity into her role as a magical warrior. The team also encounters a mysterious boy named Asumi Fuurin, who harbors a connection to the Byogen Kingdom and plays a pivotal role in the overarching conflict.

The narrative explores themes of healing, both physical and emotional, as well as the importance of environmental stewardship. The Precure's powers are tied to the natural world, emphasizing the interconnectedness of all living things. The series culminates in a climactic battle against King Byogen, the leader of the Byogen Kingdom, who seeks to plunge the Earth into eternal decay. Through teamwork, determination, and the support of their friends and allies, the Healin' Good Precure ultimately triumph, restoring balance to the planet and reaffirming their commitment to protecting the environment and each other.