18 Again" is a Korean drama about a man on the verge of divorce who suddenly finds himself back in his 18-year-old body, while his mind remains that of a 37-year-old. He uses this opportunity to reconnect with his family, particularly his children, and to address past regrets, including his decision to abandon his basketball dreams for marriage. He attends his children's high school under a new identity, navigating the challenges of adolescence while also trying to understand his wife's perspective and improve their relationship.