It is 2007 and the world is in the grip of a sinister epidemic: Indigo Syndrome. Children are the only carriers, and anyone who comes near them is afflicted with severe headaches, nausea and vertigo. In Austria, Indigo children are sent to the Helianau Institute in the far north of the country, where they cannot affect the wider population. There, one of the teachers, Clemens Setz, witnesses students being taken away in strange masks. When Setz tries to find out what is going on, he swiftly loses his job.
Fourteen years later, former Indigo child Robert Tätzel notices a newspaper article about his old teacher: Clemens Setz has just been acquitted of a brutal murder. But Tätzel harbours resentment against Setz and decides to investigate.