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.

When Nicole Atkins returns to graduate school, a previous affair with a married professor is the last thing on her mind. However, someone else on campus has his eye on Nicole, someone who knows all her secrets.

Follow the lives of a group of young adults living in a brownstone apartment complex on Melrose Place, in Los Angeles, California.

Federal agent Alexandra Barnes believes that Catherine Petersen is a serial killer who marries rich men and then murders them for their money. But since Catherine is seemingly a master of disguise and has multiple identities, Alexandra can't prove anything with conventional detective work. With no other option, she goes undercover, pursuing the same man as Catherine, and hoping that Catherine will slip up and reveal her true identity.

A small town is terrorized by a homicidal maniac known as The Creeper.