In an instant, photographer Abby Mason's life turned into a painful nightmare. A second - and her six-year-old stepdaughter Emma, whom she had already grown to love as her own daughter, disappeared into the fog that covered the deserted beach. Desperate searches yield no results. The police unofficially advise Abby and Emma's depressed father to prepare for the worst - after all, so many children disappear without a trace in the country every day... But Abby does not intend to give up. Day after day, she continues to search for Emma. And one day - thousands of kilometers from San Francisco - Abby attacks a trail that could lead to the girl...