In the first decades of the 20th century, when life was being transformed by scientific innovations, researchers made a thrilling new claim: they could tell whether someone was lying by using a machine. Popularly known as the “lie detector,” the device transformed police work, seized headlines and was extolled in movies, TV and comics as an infallible crime-fighting tool. Husbands and wives tested each other’s fidelity. Corporations routinely tested employees’ honesty and government workers were tested for loyalty and “morals.” But the promise of the polygraph turned dark, and the lie detector too often became an apparatus of fear and intimidation. Written and directed by Rob Rapley and executive produced by Cameo George, The Lie Detector is a tale of good intentions, twisted morals and unintended consequences.

A professional fraudster Zuo Nan and his disciple Ma Hou meet up with Ma Xiaofan, a lie detector and real "scumbag",

Casey Anthony's parents undergo polygraph tests to answer lingering questions.

Zhou Yi, a strong woman who serves as the CEO of a certain company, has another relationship with Tang Kai (played by Sun Chun), an ordinary employee in her company. The two are an unmarried couple who are about to enter the marriage hall. After the grand wedding, the pair of lovers finally tied the knot. Unexpectedly, the festive atmosphere has not yet dissipated, and all kinds of unimaginable and weird events will follow one after another.

A young attorney (Bonita Granville) is convinced a murder suspect is innocent in the killing of his wife.