Due to a silly coincidence, two men start living together - two Nikolays Panchenko. Both of them are musicians; however, one of them is a pensioner and plays classical music, while the other is a young rock musician who gathers hordes of ladies at his concerts. The difference in music tastes and domestic squabbles gradually make the namesakes archenemies. And suddenly, the older Panchenko is visited by his beautiful daughter Nadya. The younger Panchenko falls in love with the lady but is unaware who her father really is.