A man in a seemingly happy relationship requests an infidelity investigation one day before he and his fiancée are due to file their marriage papers. They have already greeted both families, but for months she has been coming home late, ignoring messages and secretly contacting an unknown man. Investigators follow her on the weekday when she is always late. The affair partner's seized recordings reveal graphic private sex and provide undeniable evidence of her betrayal, now exposed to the world.