Lin Tingwan, a psychology prodigy at the police academy who was forced to drop out, becomes an online sensation for solving cases with her golden finger, the ability to detect every lie by reading microexpressions. When she is forced to partner with Lu Chen, a criminal investigation captain who trusts only hard evidence, the two go from clashing to working in harmony as they investigate a string of cold cases closely connected to her mother's death. But the mastermind known as “the Judge” is staging a series of carefully orchestrated “trials,” determined to prove that their procedural justice is nothing but a hypocritical joke.
