An ex-homicide detective with memory loss is forced to solve a brutal murder, only to uncover chilling secrets from his forgotten past.

Gifted psychiatric nurse Nik Katira is the most stable person at Wakefield mental health unit in the Blue Mountains of Australia. As his own sanity suddenly starts to slip, he finds himself questioning the line between reality and madness.

In Maralinga, South Australia, at the height of the Cold War, at a remote army base carrying out British nuclear testing, paranoia runs rife and nuclear bombs are not the only things being put to the test.