Liang Yifei, a humble spare tire who was cuckolded by his fiancée for three years, became completely black after he caught his girlfriend and a second-generation rich man kissing passionately in a car on a rainy night. When he was about to end this fucked-up life with a bottle of sleeping pills, something that called itself the "spare tire system" bound him - as long as he continued to act as the spare tire, he would be able to gain the power to defy nature.
