According to the plot, successful TV presenter Stasya learns that her lover cheated on her with her best friend while pregnant. Devastated by the betrayal of the closest people, she decides not to tell the future father about the child. Time passes, Stasya is happy in her new marriage. However, in a few years she will have to meet with her ex and reveal the secret. Stasi's son is diagnosed with a terrible disease, a donor is needed. But neither Stasya nor the child's father can become one. The umbilical cord blood of a sibling can save a boy. And for this, the biological parents need to give birth to another joint child. This is how the story of the struggle for the life of a little boy begins, which will force all the heroes to rethink life's values.