" The number one enemy " story took place in 1938 in the northeast of China, by Zhang Jiayi, Song Jia, Cheng Yu as the leading actor, the ups and downs, suspenseful, fascinating, popular audience. The Zhou Yi was a communist agent, in order to facilitate its latent in the interior of the enemy, organizations send a female officer Gu Qiuyan to pose as his wife. However, in the face of the spy, the thoughtful powerful opponent Gao Bin, two people 's true identity is facing grim challenge, Zhou B even had to reluctantly at first wife in front of their own shot. At the same time, the strange bedfellows " false marriage " relationship between also quietly changing. Gu Qiuyan is in danger, Zhou Yi on the enemy was advancing, eventually chose to return to Harbin to save Gu Qiuyan. However, waiting for him is a road of no return.