Radio talk-show worker Miranda (Abril) uses daily dog walking as an excuse to cruise for extra-marital encounters. And successful scriptwriter Javier (Bardem) is a phone-sex junkie. When the two meet at a sex addiction clinic to undergo therapy, they embark on a steamy affair with psychological, suspenseful and shocking ramifications. Meanwhile, Miranda s husband Félix (Gomez) is investigating a murder case that inexplicably becomes linked to his wife s affair. You'll be hooked by the opening credit sequence and then you'll be swept away by the sheer bravura style, non-stop sexual antics and powerful luridness of this highly erotic study in compulsive obsession - with a startling and unexpected twist ending.