Never give up! That’s the principle that guides wealthy businesswoman Eleonora, who is confined to a wheelchair. Ivan Podushkin, her personal secretary, also has to follow this slogan. Everything would be fine, but Nora has convinced herself that she is a great detective—and Ivan drives around the city with tongue-in-cheek expression, carrying out her assignments. The reason is that something happened to Nora’s friend, Sonya. She was accused of a brutal murder of her son’s fiancée. Everything points against her; she is arrested. But Nora doesn’t believe that the educated, intelligent Sonya could even harm a fly. Ivan rushes around searching through the contacts of the murdered woman—and he himself doesn’t even notice how he ends up at the murderer, who has already sentenced the unfortunate detective.