 Herman sees an ad in the paper about an easy job in a detective agency. He s excited about the opportunity of becoming a detective, including training and good pay. Grandpa thinks that it s a crazy thing, but Herman s already sent his application to the agency. Calling himself agent 704, Herman begins to practice, disguising himself in all possible ways and chasing suspects in the street during the night. Lily doesn t know about Herman s secret job, and suspects that he is having an affair with some woman. Desesperatly, Lily goes to the same agency where Herman s searching for his first opportunity, asking the boss that follows her husband and tell her whether he s seeing another woman or not. But after hearing the creepy description of Herman, the boss won t run risks, and he ll put in charge the so called agent 704. Excited by his first serious case, Herman begins to study strategies with Grandpa, who asks him to make a portrait of the unfaithful husband. They ll have a surprise after having seeing the finished draw.