Upon leaving work one day, Marc sets out to meet his girlfriend, Elena, for their usual Friday night date. On his way he bumps into a mysterious and captivating girl with long, black hair who steals his wallet; he chooses to follow her and never arrives at his destination. One month later, fed up with the fruitlessness of the police’s investigation into Marc’s disappearance, Elena and Marc's brother Guille decide to begin an investigation of their own. Driven by courage and their love for Marc, they find themselves in the line of fire of mysterious circumstances that they never expected. An alluring mix of characters and plenty of adventure and intrigue makes this novel accessible to young readers.