Dolphines Tristan and Pavlova adopt a boy, Mikko, left behind after a shipwreck.
| Actor | Role |
|---|---|
 Evgeniy SteblovNot listed | Not listed |
 Semyon FaradaNot listed | Not listed |
 Tatyana DogilevaNot listed | Not listed |
 Vasiliy LivanovNot listed | Not listed |
 Lev ShabarinNot listed | Not listed |
 Boris BystrovNot listed | Not listed |
 Vladimir ProkhorovNot listed | Not listed |
 Nikolay GrabbeNot listed | Not listed |