On her daughter Lizzy’s birthday, Eleanor receives a video call from Lizzy, revealing she’s been locked alone in a car under the scorching sun, on the verge of death. Meanwhile, her husband Mason is at an amusement park with Selene, the widow of his late best friend, and her daughter Dolly. As Eleanor desperately searches for her daughter, she faces deception and suppression from those around her. Emotionally shattered, Eleanor gets help from Benjamin, a surgeon and her former junior schoolmate. They find Lizzy trapped in Selene’s car, suffering from heatstroke and unconscious—but it’s too late. Lizzy tragically dies. After reading Lizzy’s diary, Eleanor resolves to divorce Mason, ending a marriage filled with deceit and indifference.

One day, Alexandra received a distress call from Bella and discovered that Jerald had taken his first love, Dayna, out for fun, leaving Bella locked in a hot car. Eventually, she arrived too late to save Bella, who had fainted from heatstroke and passed away. This tragic event left Alexandra disillusioned with Jerald, leading her to file for divorce...