Based on classic children's novel of the same name, set in a new time period in 1947 England, on the eve of Partition in India, and in the aftermath of WW2 in Britain, "The Secret Garden" follows Mary Lennox (Dixie Egerickx), a prickly and unloved 10-year-old girl, born in India to wealthy British parents. When they suddenly die, she is sent back to England to live with her uncle, Archibald Craven (Colin Firth) on his remote country estate deep in the Yorkshire moors.

There, she begins to uncover many family secrets, particularly after meeting her sickly cousin Colin (Edan Hayhurst), who has been shut away in a wing of the house.

Together, these two damaged, slightly misfit children heal each other through their discovery of a wondrous secret garden, lost in the grounds of Misselthwaite Manor. A magical place of adventure that will change their lives forever.