Huang Tian, the owner of a charity canteen, saves an elderly man named Li Jianshe after he collapses, only to be falsely accused of serving poisoned wontons. The entire Li family joins forces to fabricate testimony and incite online harassment, devastating her business and hurting her family. Keeping her composure, Huang Tian preserves surveillance footage as evidence and prepares to fight back. The other side even stages a fake accident to extort money. At trial, her assistant Yang Guo faces off against the unscrupulous lawyer Zhang Hua. Armed with a complete chain of evidence, they win the case. The accusers are sent to prison, and the corrupt lawyer has his license revoked.