Valverde del Camino, 2019. A serial killer leaves a third corpse with the same note in Huelva. It's the police's only lead. Three weeks and nothing. Ángela Ramírez left Valverde after her mother's death, and now, convinced by her partner and her best friend from her youth, she will have to return to face her most difficult case, and not only that, but also her past. A past she thought she had left behind. With the help of the Guardia Civil, Angela and Julieta, who dreams of becoming famous as a private detective, will have to find the murderer who has been tormenting the hitherto quiet Huelva for almost a month. And all this while solving something even more complicated than the crimes they're investigating - their own relationship. From Huelva to Valverde and throughout the province, Angela and Julieta will have to trust each other more than ever to unravel the identity and motives that have led someone to murder three people with no apparent connection.