DS Lucas Walker is on leave in his hometown, Caloodie, looking after his dying grandmother. When two young German backpackers vanish from the area on their way to a ranch, he finds himself unofficially on the case. But why all the interest from the Federal Police, when they have probably just ditched the heat and dust of the outback for the coast? As the number of days the couple are missing climbs, DS Walker is joined by the girl's sister. A detective herself from Berlin, she is desperate to find her before it's too late.

Gemma Guillory has lived in the Australian Outback enclave of Rainier her entire life. She knows the tiny, red-dust town’s ins and outs by heart, knows the people like they are her family, their quirks as if they were her own. She also knows her once charming town is now remembered for one reason and one reason only: three innocent people died there at the hands of a serial killer. The last stop on the Rainier Ripper’s trail of deaths fifteen years ago was her picturesque little tea shop.

It is 1997, and in a basement flat in Hackney, Isla Green is awakened by a call in the middle of the night: her father phoning from Sydney. Thirty years ago, in the suffocating heat of summer 1967, the Greens’ next-door neighbor Mandy disappeared. At the time, it was thought she had fled a broken marriage and gone to start a new life; but now Mandy’s family is trying to reconnect, and there is no trace of her. Isla’s father, Joe, was allegedly the last person to see her alive, and now he’s under suspicion of murder.

Six minutes in the wrong place at the wrong time—that’s all it took to ruin Sydney detective Ted Conkaffey’s life. Accused but not convicted of a brutal abduction, Ted is now a free man—and public enemy number one. Maintaining his innocence, he flees north to keep a low profile amidst the steamy, croc-infested wetlands of Crimson Lake. There, Ted’s lawyer introduces him to eccentric private investigator Amanda Pharrell, herself a convicted murderer.

Flynn was only a teenager when her parents were killed in a terrible accident. Too young to lose her parents, too young to take on responsibility for her younger sister Kaiya, too young to protect Kaiya from the harshness of their new lives in the following years. Desperate to help her sister, Flynn reaches out to Willa Tomlinson, a grief counsellor renowned for helping her patients cope with profound loss. Under Willa’s influence and care, Kaiya finally seems to turn a corner, joining the climate action collective that Willa leads.