Nguyen Minh Khang and Tran Ngoc An have been married for three years and remain deeply in love. Not long ago, An quietly underwent a contraceptive procedure and started practicing yoga. Khang assumes it is to spice up their marriage, but An gradually avoids intimacy, grows close to yoga coach Le Quoc Hung, and often goes out on excuses. Anonymous recordings, suggestive photos, and abnormal car-vibration alerts convince Khang that she is cheating, so he decides to find evidence. He follows her to the yoga studio, locker room, and restaurant—
