When Amber Jones wakes up in her sister Sage's speeding car, with no idea how she got there (though the hangover is a clue), all she wants to do is go home. But Sage is convinced a road trip to Alice Springs will finally answer the burning question: who is Amber's father? Because nine months before Amber's birth, her late mother Goldie made the same trip . . .
Armed with just a name and Goldie's diaries, Amber agrees to search for a man she's never met in one of the world's biggest deserts.
And that means spending two weeks in a convoy of four-wheel-driving tourists and camping in freezing desert nights. To make matters worse, her fellow travellers hate her and the handsome tour leader Tom thinks she's an alcoholic.
But slowly the desert starts to reveal its secrets - and Amber must decide which horizon to follow . . .