The action of the movie takes place on the Black Sea, where a team of brave divers are working. They are engaged in lifting sunken ships. The hero of the movie, the brigadier of divers Andrew, brave and uncompromising, calls himself "Diver-2", as the first number remains Neptune. The film tells about the dangerous and selfless work of "Diver-2", ready to come to the aid of people in the sea and on land...