When a boy called Mat?ias asks his favorite author, Rafael Mundo, to write a horror story as a birthday gift for his friend Chelo, Mundo is too busy trying to create an advertisement, but he appreciates Mat?ias's creativity, which brings the boy in contact with a sinister advertising agency.When a boy called Mat?ias asks author Rafael Mundo to write a horror story, Mundo is too busy trying to create an advertisement, but he appreciates Mat?ias's creativity, which brings the boy in contact with a sinister advertising agency.When a boy called Mat?ias asks his favorite author, Rafael Mundo, to write a horror story as a birthday gift for his friend Chelo, Mundo is too busy trying to create an advertisement, but he appreciates Mat?ias's creativity, which brings the boy in contact with a sinister advertising agency.When a boy called Mat?ias asks author Rafael Mundo to write a horror story, Mundo is too busy trying to create an advertisement, but he appreciates Mat?ias's creativity, which brings the boy in contact with a sinister advertising agency.