In the near future, the world is a desolate place occupied by the undead. Strange crystals emit a deadly zombie virus as the last remnants of humanity struggle to avoid infection and survive. Despite all this, life is relatively peaceful for young Ruby, who lives in the Amina Safe Zone with her father and a small band of other survivors. All of this changes when Ruby encounters Arvan, a white-haired young man with pale skin and no heartbeat. This meeting sets off a series of events that force Ruby and her father to embark on a journey to discover the truth.

The story of three protagonists living in the world of Traces and Troubles. [This version of Trace was written and drawn by another webtoon author] Original Webcomic

The human race is becoming more and more dependent on increasingly complex technology and machines; machines that inevitably break down. According to those lucky people who work at ATMT, the best job in the world is to be one of those special people who exists between the human world and the cyber world as "therapists", inserting their consciences into the broken machines via a proprietary interface to conduct the repairs. Such a job is not without immense risk and can result in a person being trapped in the device as an annoying, pitiful bug. Amongst the therapists, there exists a chosen few who have additional power and capabilities and who face the greatest risks and dangers - the Automata.