At the end of the 90s, Sagrario (Belén Rueda), Paz (Gracia Olayo), Gloria (Toni Acosta) and Father Girón (Emilio Gutiérrez Cava) formed an investigation team specialized in paranormal phenomena: the Hepta group. Although the group is not having the best time, they agree to investigate an antique shop where strange things are happening. But what seemed like a case like any other will become the most difficult of their lives. And only together can they solve it.