A playwright attends his last effort's premiere ,then returns to his desirable mansion to enjoy a well-deserved rest;alas ,no sooner had he reached the door than the chimney fell on him. The writer discovers that his wife has an affair with his collaborator,and ,it makes the matters worse,the lovers want to do away with him ;he decides to launch a preventive strike and to achieve the perfect crime to eliminate his rival :drowning the victim in his bath ,then throwing him into the lake.