Mary (Cherie Nancy Cherie Lunghi) and Colin (Leigh Lawson Leigh Lawson) transform Miservite Manor into a war orphanage while they firmly guard the key to the secret garden. Colin works abroad, and Mary decides to leave the estate in order to reunite her husband and wife. Before leaving, she entrusts her children to Martha (Joan Pryce White Joan Plowright) and gives her the keys to the secret garden. Although she was repeatedly told never to open the door of the secret garden, Martha's curiosity about the secret garden grew with each passing day. Lizzie (Camilla Baylor Camilla Belle), a little girl from the orphanage, steals the key to the secret garden. At night, she and her partners Rob (Aled Roberts), Steve (Justin Girdler) and others sneak into the secret garden under the cover of darkness.