Zhou Yi is a Communist Party agent. In order to facilitate him lurking inside the enemy, the organization dispatched a female operator, Gu Qiuyan, to pretend to be his wife. However, in the face of Gao Bin, the thoughtful and powerful opponent of the Secret Service, the true identities of the two faced severe challenges. Zhou Yi even had to reluctantly watch his original wife be executed in front of him. At the same time, the relationship between the "fake couple" who have different dreams in the same bed is also quietly changing. Gu Qiuyan was in a critical situation, Zhou Yi was pressed by the enemy step by step, and finally chose to return to Harbin to rescue Gu Qiuyan. However, waiting for him is another road of no return.