"Tobé! Kujira no Peek" centers on a young boy named Peek, who lives in a small coastal village. Peek’s life takes an extraordinary turn when he encounters a mysterious flying whale named Kujira. This whale possesses the ability to soar through the skies, defying the natural order, and forms a unique bond with Peek. The narrative explores their growing friendship as they embark on a series of adventures, uncovering the secrets behind Kujira’s ability to fly and the origins of its existence.

The story is set in a world where the line between myth and reality blurs, with the flying whale serving as a symbol of wonder and the unknown. Peek, driven by curiosity and a sense of adventure, becomes determined to protect Kujira from those who seek to exploit its powers. Along the way, he encounters various characters, including scientists, treasure hunters, and otherworldly beings, each with their own motivations tied to Kujira. The series delves into themes of friendship, environmentalism, and the clash between human ambition and natural harmony.

Peek’s journey is not just physical but also emotional, as he grapples with the responsibilities of his bond with Kujira and the impact their actions have on the world around them. The narrative builds toward a climactic confrontation where Peek must make difficult choices to ensure the safety of Kujira and the preservation of the delicate balance between humanity and nature. The series balances moments of lighthearted adventure with deeper, thought-provoking undertones, creating a story that appeals to a wide audience.