The plot involves three comrades sent to organize the workers in China. They meet a young militant, who offers to join them as their guide. They are forced to hide their identities because organizing the workers is illegal. The three comrades instruct the young comrade to abnegate himself and to take advantage of opportunities. He is told to hide that he is a communist. Their mission must remain a secret. Should they be discovered, the authorities will attack the organization, and the entire movement, not merely the lives of the four comrades, will be put in danger. Before entering China, they all put on masks in order to appear as Chinese. At the sight of the injustices and oppression, the young comrade is not able to contain his desires and acts immediately to correct the wrongs he see around him. As a result, he exposes himself by taking off his mask. When he does, he puts the entire mission and movement in danger. As a revolutionary uprising among the workers begins, the authorities pursue the young comrade. The comrades realize that they "can neither take him with us nor leave him"; if they help him to escape, they will be unable to help the uprising, and the needs of the many outweigh those of an individual; if he is left behind and caught, he will unwittingly betray the movement and then be shot. To save the movement, they conclude that their only solution is to shoot him. They ask him for his consent. The young comrade agrees to his fate in the interest of revolutionizing the world and in the interest of communism. He asks them to take him to the lime pit and to help him with his death. They shoot him and throw his body into the lime pit, so that the authorities can not identify him and put the uprising into danger. The play concludes with a chorus, to whom they have been telling their story, reassuring them that have made the correct decision.