Lan is a thirty-year-old ordinary national civil servant who holds a medium-sized but key position. In the eyes of outsiders, he is a good husband, a good subordinate, and a good leader. He is slightly considerate and gentle to his gentle and beautiful wife. However, he has maintained a long-term ambiguous relationship with his female subordinate Ding. Ding is a slim and beautiful modern girl who loves Lan deeply. In the office, Lan carefully maintains the balance of all aspects of the complicated interpersonal relationships in the office; but at home, the slight care for his wife is hidden in the pickiness and impatience, and he insists on sending lonely emails to his own mailbox year after year. What kind of secret is there? And when extramarital passion encounters real interests, can Lan and Ding's relationship withstand the test? What kind of ending will this relationship bring to Lan? Will he be ruined or will he still be trapped between the two women?