The “old ghost”, an underground worker of the Communist Party, succeeded in breaking into the Japanese Puppet intelligence organization. But the transmission route was cut off at a critical juncture, and his identity was about to be exposed. In desperation, the "old ghost" started dealing with the Japanese Puppets and the KMT military spy agents who broke into the inner organization. The “old ghost” is determined to pass on the final intelligence even if he has to pay a high price.