In 2012, Lin Shen, who had a dark red birthmark on his left cheek, witnessed his mother being "accidentally" killed by a bully while trying to protect him. Ten years later, he swallowed a mysterious liquid and fell into the "Abyss System", where he reincarnated in the purgatory of memory to take revenge: the red wine that poisoned his classmates, the data ghost that tampered with financial statements, the rusty classroom countdown...
When the bully becomes a copy of the NPC, when the policeman Su Man's violet brooch flashes the space-time code, when the birthmark turns into the brand of the system that devours humanity——
He finally discovered that all the bullies were made into NPCs and suffered in a cycle, and the system was actually an energy farm for high-dimensional civilization "observers" to harvest human violent emotions. As his revenge progresses, he gradually reveals the crueler truth - he is the dark side split of the observer's body, and all reincarnations are rituals of self-judgment. In the end, he united with the global Avengers to destroy the Black Tower, used the birthmark to reverse the violent energy into healing power, and restarted human civilization.
