On the streets of downtown South Korea, there lives a taciturn and submissive man, Chi Dongzhe (played by Gong Yoo). He works as a designated driver and is accustomed to being looked down upon and insulted by others. The real him is a former member of the special forces who escaped from North Korea. He is willing to give up everything in order to track down the murderer who killed his wife and children. In North Korea, he was valued by the respected President Park, but the president was killed one night. Before his death, the old man gave his glasses to Dongzhe. Dongzhe, who became an important suspect in the case, was involved in a series of whirlpools full of killings and conspiracies, and he didn't know that there was a huge secret hidden in the glasses. The secret departments of North Korea are ready to move, and the training instructor of the Air Force Special Forces CCT, Colonel Min Shixun (played by Park Hee-soon), is also chasing Dongzhe. Standing at the cusp of the storm, Dongzhe is forced to rely on his own strength to deal with various forces...