Three years ago, Lu Ze was a feared name in Nanping City's underground debt circle, until a well-planned plot sent him to a high wall and caused his only sister Lu Xia to suffer a car accident and become permanently disabled. Three years later, Lu Ze returned to the city dragging the case files with him and hid in an auto repair shop on the outskirts of the city, trying to use engine oil and sweat to wash away the mud of the past and piece together his sister's broken life. But the city never lets anyone off easily. When the shadow of the past knocked on the rolling shutter door of the auto repair shop again with an irresistible "deal", Lu Ze was forced to re-enter the weightless zone that he desperately wanted to escape. This time, he not only wanted to survive, but also wanted to get back what he owed to him and Lu Xia with interest.
