The play tells the story of the summer of 1947, war Shouan to double agent identity long-term latent on the enemy, the detection of "day strike plan" of the story. The summer of 1947, the people's Liberation Army into the strategic counter offensive, the Kuomintang army forced the south to shrink, and the people's Liberation Army total battle. War Shouping brother warfare Shouan, long-term latent in the brigade and battalion baomiju special steering room. Because of the war Shouping uprising and by implicate, forced to stranded in Guangzhou, is fortunate enough to the underground party Qinfeng and Liu Yixiong to life on the cover was able to turn the corner. The Kuomintang is to restore the decline. In the upper layer of our army hidden the a spy network, that this war Shouan to double agent identity, return to the brigade and battalion continue to be engaged in underground work, fully cracked the secret spy network and "day strike plan", and as a patriotic trader under the guise of the National Party, the Kuomintang spy Lv Yaoting game. The war Shouan think is his brother war Shouping is "day strike plan step to chess, he cast the PLA, but secretly in an attempt to from internal damage the PLA's crossing battle. Facing the largest and the last enemy, in the face of their own brother's most trusted, Zhan Shou Anyi is speech Yan Xiao to righteousness, finally in the war Shouping attempt blow up the dam of critical moment, to convince him to lay down the butcher's knife.