Stasia, a successful TV presenter, finds out that her lover has cheated on her with her best friend while she is pregnant. Devastated by the betrayal of those closest to her, she decides not to tell her future father about the child. Time passes, and Stasia is happy in her new marriage. However, in a few years, she will have to meet her ex and reveal a secret. Stasia's son is diagnosed with a terrible disease and needs a donor. But neither Stasia nor the child's father can become one. The umbilical cord blood of a sibling can save the boy. To do this, the biological parents need to have another child together. Thus begins the story of the struggle for the life of a little boy, which will force all the characters to rethink their life values.