A happy couple, who have met each other's parents and are planning to file a marriage registration the next day, requests infidelity investigation. Over the past few months, their girlfriend has been returning home late and her LINE replies have been slow. After seeing her contact a stranger, the boyfriend suspects infidelity. To uncover the truth, he tails her on days when she returns home late. The confiscated footage of her infidelity with the other man is now being exposed worldwide.
