In the end times, fierce ghosts have returned, and mortals have nowhere left to turn.
One week before the ghosts returned, Shi Yu received a brand-new smartphone sent by her boyfriend, who had been dead for three years.
A drop of blood activated the phone's hidden System, and she launched an Earth Online simulator that could travel between the past and the future.
With this heaven-defying ability, Shi Yu could see every danger before the apocalypse arrived and avoid every deadly trap!
A residential complex full of ghostly shadows? She lays her plans in advance and makes the fierce ghosts slaughter one another!
The soul-devouring ancient tree at the Great Golden Temple? She simulates the route and finds a chance to survive!
A deadly trap by the roadside, where a lantern ghost beheads its victims? She turns the tables and reaps the rewards!
One deadly instance after another becomes a stepping stone for her! Death? It's long since become mere background to her progress!
But her power to [Simulate] shines too brightly, drawing the attention of nameless examiners known only by their code names, who hunt her down.
But who is Shi Yu? After simulating again and again, she has become something even more terrifying than a fierce ghost: a human-shaped haunted weapon!
After fighting her way forward, she thought she'd reached the end, only to discover that this world was a carefully constructed lie... and that her boyfriend's death was tangled up in it, with mysteries at every turn.
If the world is this cruel and the System this powerful, then Shi Yu will defy fate and change her destiny!