Australia's Gold Coast: On a stunningly beautiful stretch of coastline, a young mother is brutally murdered and her daughter, Gabby, is left in a coma, with her life hanging in the balance.

DS Lucas Walker has just arrived in Surfer's Paradise for some much-needed recovery after injuries sustained in his last investigation. But he is soon pulled into the dark twists and turns of this home invasion gone wrong, vowing to find the men responsible. As Walker digs deeper into the dark underbelly of this shimmering city by the ocean, a case from his own past resurfaces, with deadly consequences.

And as eight-year-old Gabby, the sole witness her mother's murder, wakes in her hospital bed, Walker is in a race against time to stop those responsible before they return to silence her forever...