They live the same life as millions of us. They have a lot in common: they fall in love, get married, get divorced, take care of children, and sometimes knock back a mug of beer or a glass of something stronger. And at the same time, these are completely different people: someone hates weapons, but loves chess, and someone has a phenomenal memory. Each of them has their own weaknesses, shortcomings and talents. But they all serve in the police, investigating crimes under the leadership of Martin Beck. In the novel The Locked Room, Martin Beck and his assistants will have to solve a large number of puzzling problems. After all, they are faced with a crime to which it is very difficult to find the keys. They will have to answer many questions. In what unthinkable way could a murder occur in a room in which all the locks on the doors and windows are intact and carefully closed from the inside? Where are the weapons? What is the motive for the crime? Who's killed? And, in the end, where to look for the killer?