Single mother Caroline enters an AI competition with her genius son, only to discover that the host is none other than her first love, John. Ten years ago, Caroline was an intern at STM Group and fell in love with John. During a Christmas gathering at John’s family home, Caroline accidentally uncovered a shocking truth: John’s mother might have been involved in the tragic fall of her own parents. Heartbroken, Caroline left without saying goodbye. Now, ten years later, Caroline has become a top lawyer, known as K. She returns to uncover the truth about that fateful incident. As their fates intertwine once more, the appearance of the genius baby introduces unexpected twists in their relationship.