The longest and greatest of any insect migration is that of the monarch butterfly. This film explores the miracle of navigation as something the size of a leaf, weighing no more than a paperclip, flies across an entire continent to a place it has never been. Enter a golden blizzard as tens of millions of monarch butterflies fill the sky in the hidden highlands of Mexico. Take flight alongside migratory birds navigating by sun, stars, and instinct. Travel back in tome among exotic tribe of Africa to explore the roots of human migration. Join the sweeping spectacle of hundreds of migrating zebras in the vast plains of East Africa. Witness the mysterious migration of more than 120 million red crabs on tiny Christmas Island in the Indian Ocean. Encounter the affectionate curiosity of majestic gray whales in the beautiful lagoons of Mexico's Baja California.