Paola Pavese (Vittoria Puccini) is a young lawyer married to the police commissioner Marco D'Elia (Filippo Nigro); on the occasion of a surgical operation by her mother Emma, Paola meets the attractive doctor Giulio Guidi (Daniele Pecci) and starts a relationship with him. The husband, who is investigating the disappearance (and then the death) of Laura Romano, Dr. Guidi's young assistant, discovers that his wife is the doctor's lover. It will soon be known that the young Romano was Guidi's ex-lover and was pregnant with her, while the doctor's wife, Benedetta, was also poisoned and died. The attention of the investigators therefore focuses on Paola Pavese, who had been seen leaving the house of Guidi's wife in shock. The legal defense of the woman is taken up by the lawyer who owns her firm (Massimo Wertmüller), who is linked by economic interests to the Guidi family and who.