Private detective Inés infiltrates the employees at a multinational corporation. Thanks to the collaboration of Manuel, she gets to the heart of company intrigues. But her investigation brings her face to face with a difficult emotional and ethical decision. Eva, just back from maternity leave, is juggling work and family obligations when she discovers that her partner Iñaki is hiding something fundamental to their future as a couple. Carmen, the most experienced of the three, observes and tapes Sergio's marital collapse but can't see her own marriage is dead. While working at the detective agency run by Valbuena, these three surveillance specialists often invade others' privacy but are clueless about confronting their own secrets. All three will have to cross the thin line dividing public and private matters, bringing their own issues to light in order to solve more than just their professional cases.