Anna Macey (Elizabeth Debicki, THE GREAT GATSBY) left her Tasmanian home town of Kettering under a cloud after the mysterious disappearance of her friend Gillian in the Kettering Forest when they were children. The discovery of Anna covered in blood with no memory of what happened other than bright flashing lights along with the prevalence of solar storms in the area has lead to the town's notoriety for UFO nuts for "The Kettering Incident." Twenty-odd years later, Anna is working as hematologist in London when she starts blacking out and losing time again. Although she rebuffs her neurologist friend's suggestion that it is the recurrence of childhood PTSD and that she should go back home to deal with it, Anna wakes up several days later by the side of the road in Kettering. The dying town is in the grip of a conflict between the local logging company run by Max Holloway (Damien Garvey, ASH VS THE EVIL DEAD) and "greenie" protestors lead by charismatic Jens Jorgensson (Damon Gameau, the PATRICK remake), and she is largely unwelcome by the locals who believe her responsible for what happened to Gillian, apart from her father Roy (Anthony Phelan, UNBROKEN), old friend turned Senior Constable Fergus (Henry Nixon, TRIANGLE), and Max's teenage daughter Chloe (Sianoa Smit-McPhee, HUNG) who claims to have seen the same lights Anna saw up on Mother Sullivan's Ridge. When Chloe disappears in the woods, suspicion naturally turns towards Anna, but there are plenty of other suspects and motives. Roy has been receiving threats to his family for "sinister crimes in the woods", Chloe and her ex-boyfriend Dane (Dylan Young) were smuggling drugs for detective Brian Dutch (Matthew Le Nevez, OFFSPRING) and came up short on the last job, and logger Grayson (Ben Oxenbould, BLACK WATER) resents Chloe's "greenie" influence over his daughter Eliza (Tilda Cobham-Hervey, GIRL ASLEEP) among others. As Anna probes the mysteries of Kettering, she starts to suspect that there actually may not be a "logical" explanation for the disappearances when the town is quarantined after locals start exhibiting symptoms of a blood disease and start behaving erratically, abnormally large butterflies and moths are drawn to the lights in the woods, and Anna discovers that her own blood type changed after her own experience in the woods as a child.