A routine call from the hospital asking to confirm an upcoming appointment with a pediatrician divided Kelly Medina’s life into “before” and “after”: after all, her son Aaron grew up long ago and left for college a year ago. It turns out that a woman lives in the city with exactly the same name - only twenty years younger and with a small child in her arms. And now all Kelly’s thoughts are occupied only with her - who is she, where is she from and what does her baby look like, who still has his entire childhood ahead of him? After a chance meeting with her namesake, Kelly, who has been feeling so lonely lately, finally has a new goal - to help the young single mother. But friendship quickly turns into obsession, and when one Kelly suddenly disappears, only the other knows why...