Former teen idol Nam Hyeon-soo [Cha Tae-hyun] is now in his thirties and works as a radio DJ, quietly navigating the pressures of a career built on youth and public perception. A young woman named Hwang Jeong-nam [Park Bo-young] begins sending stories about life as a single mother to the station where he works, and she eventually steps into his life, arriving at his apartment with her son, Ki-dong [Wang Seok-hyeon]. She reveals that her real name is Jae-in and that her mother was Hyeon-soo’s first love, Jeong-nam. This revelation unsettles him at first, as he weighs the possibility of a past he never fully understood.
To settle the truth, a DNA test is arranged, and the results confirm that they are indeed related. The confirmation comes with a complicated mix of relief and fear: if Jae-in’s rising public profile as a performer intersects with a public paternity story, it could cause a scandal that bleeds into his carefully managed image. The two generations of the family are suddenly linked in a way that could threaten both reputations and relationships, and Hyeon-soo must decide how to respond to a reality that could upend the quiet life he’s built.
Meanwhile, Ki-dong’s father, Park Sang-yoon [Im Ji-gyu], enters the picture with a protective but mistaken assumption, initially thinking that Jae-in is romantically involved with Hyeon-soo. The situation becomes more delicate as Sang-yoon’s concerns collide with the needs of a child and a mother who are trying to find their footing in the world. The tension between duty, love, and the public eye adds layers to a story that is already emotionally charged.
When Ki-dong goes missing during one of Jae-in’s performances, Hyeon-soo realizes how deeply he cares for his daughter and grandson. The incident becomes a turning point: the family’s private crisis becomes public, and Hyeon-soo’s efforts to protect them collide with a broader media landscape. News about his daughter and grandson leaks, and his career appears to be at risk not only because of the paternity question but also due to other tabloid-heavy chatter—a separate, bruising report about a disgraced film star beating a gossip journalist that shadows the moment of truth.
Support from Ki-dong’s kindergarten teacher helps him shift his public image from a once-d teen idol to a more mature, responsible older man. The change is met with a warm, hopeful reception from the public, who respond to a more grounded portrayal of a man taking responsibility for his family and choices. This new identity doesn’t erase the past, but it reframes how others see him and how he sees himself, blending accountability with empathy.
As the holiday season approaches, the story moves toward reconciliation. At a Christmas recital, Park Sang-yoon reunites with Jae-in and Ki-dong, and the reunions deepen the bond they share. The moment represents not just the healing of a fractured family but a broader message about acceptance, renewal, and the courage to face the consequences of one’s choices. In the end, Nam Hyeon-soo’s decision to stand by his daughter and grandson—despite the scrutiny and the costs—offers a hopeful example of how love and responsibility can coexist, even in a world quick to judge.
