Midshipmen, Onwards!

Three naval cadets accidentally get possession of a secret diary that was stolen from Bestuzhev, a vice-chancellor of Russia. If this diary ever gets abroad, the consequences for the country would be grave. The cadets are trying to return the papers to their owner, but there are others who want to get the papers...

Midshipmen, Onwards! is a 1988 musical adventure movie, starring Dmitriy Kharatyan, Tatyana Lyutaeva, Vladimir Shevelkov. It holds an IMDb rating of 7.4/10 from 1,485 votes and runs 4h 50m.