Criminal police captain Song Kui falls in love at first sight with his blind-date match, Jiang Lu, but commits "three major sins" before they even meet: standing her up, being busy with work, and failing to pay for the meal. Each offense is a capital crime on the road to winning a wife. Fortunately, our Captain Song makes up for it through his actions: stepping forward in times of crisis, guarding her through the night, obeying her command to quit smoking, and catering to her every whim. Learning that Jiang's mother's old case remains unresolved, he resolves with duty and love to investigate it. Though unsuccessful due to the passage of time and insufficient evidence, it plants the seeds of trust in Jiang Lu's heart. Day by day, with sincerity and steadfastness, he slowly melts away her misgivings. Grandmother sees it all in her eyes, ultimately letting go of her biases and bestowing her full blessings, as Song Kui finally wins the goddess's heart.