At a busy festival site on a warm spring night, a baby lies alone in her pram, her mother having vanished into the crowds.

A year on, Kim Gillespie’s absence casts a long shadow as her friends and loved ones gather deep in the heart of South Australian wine country to welcome a new addition to the family.

Aaron Falk, federal investigator, is joining the celebrations. But as he soaks up life in the lush valley, he begins to suspect this tight-knit group may be more fractured than it seems. As hidden truths slowly emerge, Falk faces the darkest of questions.