Percussionist Evelyn Glennie explores what lies behind musical talent.
The musical gift is one of the mysteries of life - a natural talent that seems god-given, to a chosen few.
Jennifer Pike, youngest ever BBC Young Musician of the Year, is one of them.
Evelyn Glennie meets her and others who have the gift, and asks whether the secret lies in the nature or the nurture.
She hears from a psychologist who believes that most of us have the gift - we've just never been given the opportunity to discover it.