Observer is set in a cyberpunk rendition of 2084 Kraków,
Poland after the
nanophage, a "digital plague" that cost the lives of thousands, resulting in war and rampant drug use. After Chiron, a
megacorporation, took control of Poland and manifested the Fifth Polish Republic, a police unit known as Observers was put in control of the denizens with license to
hack their minds. Drug and
hologram addicts were made
Class C and cast off to live in
tenement buildings. One morning, Observer detective Daniel Lazarski receives a call from his estranged son Adam, whose
caller ID is traced to a tenement building. Locating Adam's apartment, Daniel discovers a body missing its head. He scans a ComPass implant and sees a missed call from "H.N." Checking the tenant log, he learns the initials belong to Helena Nowak who lives in apartment 104. At this point, a
lockdown has been triggered. In apartment 104, Daniel finds a man near death and hacks his brain for clues. Given a glimpse of the
tattoo parlour outside, he heads to the courtyard. Helena is found dead inside the parlour; hacking her brain reveals she was working for Adam, smuggling data out of Chiron. Daniel goes looking for Jack Karnas, the owner of the tattoo parlour, in apartment 210. He finds Jack murdered and follows a trail of the killer's blood to the attic, where he is ambushed and knocked unconscious. When he regains consciousness, he finds the killer dead and hacks the remains. Daniel continues from there into the sewers, arriving at the killer's hideout. Adam's severed head lies underneath a cover on a table. Distraught, Daniel is met with his son's voice mentioning a place called
Sanctuary. He finds his way deeper underground, ending up at
Sanctuarys gates. Inside
Sanctuary, Daniel meets Adam in a virtual world and learns that Adam's consciousness was transferred into a digital realm hoping it was out of Chiron's reach. However, Adam claims Chiron deployed a virus to break down his defences. Daniel is urged to
manually override the signal that caused the lockdown, releasing Adam from the building's
private network. In the adjoining building, Adam reveals he killed the original Adam for sending the virus after him and triggered the lockdown to lead Daniel to
Sanctuary. Adam asks that he be hosted in Daniel's Observer mind to save what is left of his son; if Daniel accepts, Adam takes shared control over his body and leaves the building. If he refuses, Adam transfers Daniel's consciousness into a maintenance drone and steals his body. Daniel manages to steal the body of the drone's owner and uses it to attack Adam but is shot by police as the lockdown is finally lifted, leaving the fates of both Daniel and Adam unknown. ==Development and release==