Lu Zhiyuan and his wife Su Wan originally lived an ordinary and happy life. However, by chance, he discovered an ambiguous red mark on his wife's neck, and then witnessed her getting into the car of his colleague Director Zhang, and he suddenly became suspicious. In order to find out the truth, Lu Zhiyuan sought help from his father-in-law, mother-in-law, and close friends, and then received a mysterious express delivery from an unknown source. Various clues plunged him into a whirlpool of suspicion and pain. At the same time, the company of his confidante made him feel even more conflicted - on one side there was a marriage that was suspected of betrayal, and on the other side he was an old friend who was waiting silently. When cracks appear in the foundation of trust, what secrets are hidden in this marriage in the name of love?
