For more than twenty years Wendy Whiteley has worked to create a public garden at the foot of her harbourside home in Sydney's Lavender Bay. This is the extraordinary story of how a determined, passionate and deeply creative woman has slowly transformed an overgrown wasteland into a beautiful sanctuary for everyone to enjoy - and in the process, transformed herself.

Wendy Whiteley was Brett Whiteley's wife, muse and model. An artist herself, with a finely honed aesthetic sense, she also created the interiors at the heart of Brett's iconic paintings of their Lavender Bay home. When Brett died, followed by the death nine years later of their daughter Arkie, Wendy threw her grief and creativity into making an enchanting hidden oasis out of derelict land owned by the New South Wales Government. This glorious guerrilla garden is Wendy's living artwork, designed with daubs of colour, sinuous shapes and shafts of light.

This is Wendy's story but it's also the story of the countless people who cherish the Secret Garden.