In New Ark, a future city that has forgotten its history, memory is both a commodity for trade and a shackle to maintain order. The top memory retrievalist "Zero", a man with no past, makes a living by erasing other people's painful memories. During a routine mission, he came into contact with a forbidden memory of the old world about blue sky and green land from the mind of the mysterious girl Arya.
In an instant, he went from city hunter to top prey.
Pursued by Silas, the cold and efficient enforcer of order, Zero flees with Arya, who holds the key to the truth of the world. From the glamorous upper class to the filthy data black market, every step is on the border between lies and truth. He was forced to join forces with the underground resistance organization to uncover the shocking conspiracy behind the disaster known as "The Great Oblivion."
When the lost memories gradually recovered, he discovered that his life experience was closely connected with the survival of the world. He is zero, the beginning and the end. This time, what he wants to recover is the past that was taken away from the entire world.
