Tom's life is suddenly changed when his master buys two elephants at Bristol docks.
In this adaptation of Christopher Nicolson's vivid and dramatic novel, the central story is about the relationship between a boy and an elephant.
But this is no whimsical love story - it's about power, and how power and violence distort relationships.
It's about how the rich abuse the poor, and how humans abuse animals.
And yet, this is also a simple moving drama, told by a young man, about the defining love of his life.
Tom is 16 when the story opens, a simple West Country boy, the son of a groom on a country estate in the 18th century.
When his master acquires a pair of elephants, the job of keeper falls to him.
Overcoming his fears, Tom begins a relationship with the elephants which will change the course of his life.
Adapted for radio by Elizabeth Burke
Mr Harrington....Bertie Carvel
Mrs Harrington....Claire Cage
Dr Chisholm....Richard Mitchley
Producer: Kate McAll
BBC Cymru Wales.