On January 5, 2010, five-year-old Amaya Martín vanishes during the Twelfth Night Parade in Málaga, leaving her parents distraught. Intern journalist Miren Rojo becomes captivated by the case, determined to uncover the truth behind Amaya's disappearance, as police investigate a family friend with a suspicious past. The episode ends with a candlelight vigil, marking the beginning of a gripping mystery.