1941, Shanghai. An inconspicuous second-hand bookstore in the French Concession is one of the only remaining hubs of the military intelligence network. The new person in charge, Chen Mo, codenamed "Deep Sea", must activate dormant agents, reestablish communication lines, and send a piece of top-secret intelligence about changes in the international situation out of the island under the double stranglehold of the Japanese Special High School and Wang Puppet No. 76. His weapons are not guns, but memories, codes and the courage to walk on the tightrope of humanity. Every day may be a confrontation with death.
