Nasty Love (released in the United States as Troubling Love, is a 1995 Italian thriller film directed by Mario Martone. It was entered into the 1995 Cannes Film Festival. It is based on the novel of the same name, by Elena Ferrante. The film was shot mainly in Naples, Italy.
Delia, a Neapolitan artist who has lived for many years in Bologna, returns to Naples after the sudden death of her mother, who apparently committed suicide by drowning. She doesn't believe the official verdict of suicide, convinced that her mother's exuberance, vivacity and existential positivity, which she remembers very well, would never have led her to do such a thing. She therefore begins to investigate her mother's recent past, given further impetus by disturbing phone calls received from an unknown interlocutor.