Maddie, a local reporter investigating a series of killings targeting similar looking women is caught off guard when her younger sister Olivia, is attacked in her own home. Urging on the side of caution, Maddie suggests they take a self-defense course. When Olivia starts to fall for their instructor, Maddie becomes skeptical when he refuses to reveal anything about himself, and tries to intervene before the relationship turns into a deadly obsession.

Follows Kendra who is close to have an affair with a younger man, when her young almost-lover dies she begins to doubt that her husband had anything to do with Eric's death, but it turns out she wasn't the young man's only lover.