Three Colors: Red (1994)

Valentine, a student model in Geneva, struggles with a possessive boyfriend and a troubled family. When she runs over a dog, she discovers that its owner, a retired judge, is illegally wiretapping and eavesdropping on his neighbors' phone calls. Although Valentine is outraged, she develops a strange bond with the judge – and as the two become closer, she finds herself caught in the middle of events that could change her life.

Source: TMDb