Shen Li crawled out of the ruins and rose step by step to become the strongest assassin in the apocalypse, cold-blooded and merciless, striking fear into everyone.
Then a mysterious System forcibly bound itself to him, requiring him to save one person every time he killed someone.
Shen Li tried every possible way to get rid of the System, but found none. He could only let the System lead him around by the nose.
Until he was drawn into a series of events.
From then on, the System began to change, and Shen Li found a way to interfere with it.