Engineer Alex (Daniel Brühl) returns to his hometown to work after ten years and takes on the job of designing a new robot program for his alma mater. He meets a little girl named Eva (Claudia Vega), and thinks she is different, so he invites her to help him with his work - studying Eva's behavior patterns to complete the program of the perfect child in his heart. After contact, Alex discovers that Eva is the daughter of his ex-girlfriend Lana (Marta Etura), and it was his departure ten years ago that made Lana sad to marry their common work partner David (Alberto Ammann). Because of Eva, after reconnecting with Lana, the love triangle that has been sealed for ten years seems to be repeated, and Alex's work has also encountered a bottleneck. An accident makes Alex discover the sad secret of Eva...