Jiang Ye is a top criminal defense lawyer who is known for his cold rationality. However, he witnessed judicial shady scenes in an unjust case trial that shocked the country. He burned his lawyer's license in public and declared his break with the system. Qi Sui, who was once his assistant, is now hiding on the front line of public welfare legal aid, holding evidence that is enough to overturn the entire lawyer circle. The two had not seen each other for three years, but they reunited at the defense table in an arson case - she defended the suspect and he appeared as a prosecutor. When the truth is peeled back layer by layer, what they face is not victory or defeat, but the collapse and redemption of their common beliefs.