Diego Buonese had just celebrated his tenth birthday in a little town in California, when suddenly the rainy winter turns into a terrible storm. Diego, victim of a raging flood, desperately tries to keep his head above water, but exhaustion causes him to lose consciousness. Regaining his wits, he discovers that he is in the strong clutches of a giant boy named El Niño, the weather phenomenon. El Niño has superhuman strength, can fly above the clouds, and dive to bottom of the ocean.

El Niño introduces Diego to Wiro, a small, fantastic creature with the face of a little lion monkey, the body and feathers of a parrot, and lots of magic, who lives in El Niño ’s backpack. And they just might meet La Niña, El Niño ’s friend and opposite presence on Earth.

Thus begins an incredible journey across the Americas, with uncountable adventures that help Diego learn and then share with his family and friends everything about Mother Nature’s reactions to civilization.