Two girls from an orphanage, two best friends – Nina and Irina – had a deadly quarrel when they were very young. Andrew, with whom Irina was in love, betrayed her and Nina. Unaware of her anger and resentment, Irina broke the law and was convicted. And even there she could not forgive her friend for betrayal. And Andrew did not forgive. Irina was already pregnant, but she did not have time to inform Nina about it.

The friends parted, not thinking that in many years fate would bring them together again. Andrew disappeared as he sank into the water. Irina abandoned her daughter, who was born in the area, and it so happened that Nina adopted a girl, not knowing who her mother was. And grew it.

Years passed, and Irina reappeared in Nina's life. No one knew what really happened twenty years ago – neither Nina, nor Irina, nor Andrew, who, as it turned out, went overseas and now began to look for Irina. More precisely – his daughter. He had good reason to remember the events of twenty years ago.