Living in India, Mary Lennox (Kate Maberly), a young, privileged girl, is left orphaned when her parents are killed in an earthquake. She is sent back to England where she goes to live on her Uncle Lord Archibald Craven's (John Lynch's) estate. It is a fairly isolated existence and she has to find things to keep herself occupied. She finds sickly young Colin Craven (Heydon Prowse), and a secret garden.