Fifteen years after killing her husband's lover, Inés is fresh out of prison and trying to put together a new life. Her old friend Manca is out now too, and they've started a business dedicated to pest control and private investigation, by women, for women. But Señora Bonar, one of their clients, wants Inés to do more than kill bugs: she wants her expertise, and her criminal past, to help her kill her husband's lover, too.