It’s the swinging 60s, Sydney. Post-war Australia is booming and the excitement of the city lures two young women, Rose and Margot, eager for adventure in these rapidly changing times.

At a coffee bar in cosmopolitan Kings Cross, they encounter two debonair Europeans, Stefan and Josef, former Polish army officers seeking to rebuild their lives. Yet romance between Rose and Stefan is thwarted by lingering wartime trauma. And Margot, well, she has no intention of marrying a penniless immigrant like Josef. But it’s a tragedy neither of the women sees coming which is about to change their lives forever.

Fast-forward over two decades later, and a leading current affairs show has begun investigating a long-ago murder on the sleepily opulent Northern Beaches. Some of the locals have reason to feel nervous - including the police. Others, who’ve stayed silent for years, are at last tempted to tell the truth. A truth Margot and Rose could never have imagined.

From Sydney’s deceptive glitter, to the grit of Warsaw under siege, Dark Side of the Harbour is a gripping story of courage, resilience and deadly secrets - where only the strongest bonds survive.