Robert Tovmasyan is a young 30-year-old guy. Due to financial problems, in the age of 25 years, he robbed the house of corrupt chief of the customs house. After the robbery, the police begin to chase Rob, and he has to hide the bag of precious stones and gold under the ground. After 5 years, Rob leaves the prison and finds out that, a school was actually built on the place where he hid the bag. He fraudulently starts to work in that school as a history teacher in order to be able to dig out his bag. It turns out that Rob must teach the messiest class of the school, 11B, which turns his life into a hell. From all this in Robs life there is only one bright side - he falls in love with the class teacher, Lusine, who has been dating Eric for many years and is going to get married with him.