Green Leaf's cousins are all older than he and they don't like to play fair. He longs for a friend his own age he can play with, explore and fish with. When he meets a Luxembourger boy, Henri, Green Leaf is sure they could become friends, but Henri's words are strange to Green Leaf. How can they play and explore together?
Green Leaf's mother says, "Friends learn to speak one another's words". But will Green Leaf learn to say his friend's words well enough to save Henri when he falls into danger?