Set in Bilbao, the plot of the series focuses on the work of Romina Goitia, Romi, a thirty-year-old private detective with an innate gift for investigation: she is deaf, which is why she has developed a unique ability to interpret non-verbal communication and detect lies. Romi complements this extraordinary skill with a certain tendency to skirt the law to achieve her goals, in contrast to the extremely disciplined and responsible profile of Patricia Irureta, her new intern partner.