The children are especially fond of Geronimo, a homing pelican. But when the big bird fails to return from a delivery, Taber – the youngest sibling – is devastated; so much so, he mails himself to New York, where Geronimo was sent.
Orinthia and Séafra follow suit, stealing a precious stamp and hopping in a freight crate – and soon all are embarked on an extraordinarily daring first-class adventure …