After the tragic oxymortia of father young Надинька stopped behind who lost both parents. She lost a house in that lived all life yet and. Now she has a faithful nurse Агаша and darling of Сереженька only.Сереженька, Sergey Ilich, so taken in by an especially important project: he is busy on building of first in the world of atomic ice-breaker "Lenin", that so rarely rings from Leningrad. And a poor nurse Агаша clearly disbelieves in existence of groom, because never him did not see.And here yet to objective difficulties of life of young people the problems created by ill-wishers are added: a talented engineer Sergey with his innovative ideas is declared a wrecker.To whom and why is this persecution needed? And will be young together?