Friendship meets Fibonacci when Leo, who loves maths, meets Lea, who loves art. Leo has a unique way of experiencing the world. When other children hear words, he sees numbers. And so the days go by-1, 2, 3, 5, 8, 13, 21, 34-still no friends for Leo. Not even the new kid, a shy girl named Lea, who shares his desk. One day, when 55 bulbs poke up in spring, a dramatic event on the playground brings the two children together in friendship and understanding.