Dima, an honest and idealistic plumber’s assistant, devotes his free time studying to fulfill his dream of becoming an engineer. Leaving his family at home one evening, he goes to a seemingly derelict building housing the city’s poor to investigate a leak. What he finds is much worse when he realizes that the 800 tenants need to be evacuated immediately. Requiring municipal authorization, he goes to see the mayor, and realizes that things aren’t as clean as they should be. Dima spends the night chasing the corrupt in order to save those whom everyone has forgotten.