Glass Beads (1978)

Big changes are coming to the life of twelve year old Masha after vacations on Kamchatka island. Her father spends most of his time sailing and lives in Petropavlovsk-Kamchatskiy, while the girl lives with her mother in Odessa. Masha had long dreamed of traveling to Kamchatka; now, the long-awaited day has arrived. Summer will pass in a flash for both father and daughter: Masha will spend two months with her father on Bering Island, befriend an Aleut boy named Radik, and convince her mother not to return to Odessa at all.