The immersive story follows a cute 5-year-old deer, May, and her adorable animal friends. One day, they accidentally discover a magical book titled The Book of Heart in the forest. When they touch the book, they become trapped into a magical forest. And the audiences will join May on a journey to rescue her friends and recover four lost pages symbolizing the lost goodwill: Caring, Courage, Wisdom, and Humor through interactive choices, tactile sensors, and guided games. By rebuilding the Book of Hearts and exploring the adventure, they ultimately return to the real world. Along the way, they face challenges, share worries, and overcome difficulties together. In the end, they realize that good friends can share warmth and troubles, bringing innocence and goodwill back to the world.