When Dr Christine James, a grieving widow identifies the body of a murdered bag lady, she has no idea why her childhood friend has become a victim. Now someone is following her movements, someone who doesn't want secrets out in the open.

Scottish Detective Annie Macpherson, on an exchange with the Westford Police in Connecticut didn't believe Angela Goodman was in danger when she presented herself at the station. Now Angela has been brutally attacked in her own home and left for dead. Annie can't afford to make another mistake.

The vicious murder of a local priest has all the marks of a ritualistic attack, but what is the motive behind it? Before they can start to answer that, Annie and her colleagues have another body on their hands whose injuries are too similar for it to be coincidence.

Andy Tremont regains consciousness to find himself behind bars, the bars of an animal cage. As Annie and Detective Dave Ellison begin to investigate the disappearance, she is also asked to take on a liaison role with the prestigious regional squad specialising in child sexual abuse. As the detectives get further into investigating the kidnapping, their inquiries become entangled with the regional squad's work. It becomes a question of who is an innocent victim and who is an accomplice?

A death in a residential unit for people with complex needs triggers an undercover assignment for Annie. In a sister unit, Ellie Harrington, a student journalist is doing voluntary work and begins to suspect that something is wrong, very wrong. For both women, ascertaining what is really going on behind closed doors becomes the highest priority, but will Ellie Harrington's naive enthusiasm jeopardise the work that Annie is doing. Could both women find themselves in grave danger from a very powerful and ruthless set of conspirators? At the core of it, are the vulnerable residents simply too scared to tell their stories.

A vicious assault on a local university student becomes the latest case for Detective Annie Macpherson and her Westford police colleagues. What starts as a single investigation soon morphs into the search for a serial predator, preying on women at university campuses in both Connecticut and the neighbouring state of Massachusetts. The cases are too similar to be coincidental ...

A therapeutic group for survivors of abuse goes rogue. They form a murder pact: you either kill someone on behalf of another member or you agree to be murdered yourself. The stakes are high, the leader obsessed with completing the plan.

A man's body is discovered in an alleyway in Westford, Connecticut. Scottish Detective Annie Macpherson, continuing her employment with the local police, must rise to the challenges of leading an investigation and carrying a firearm for the first time.

Soon there's a second case ...

The detectives ultimately find themselves in a race against time to unearth long-buried secrets before someone else dies.

A man is held captive in his own home, the place where he should feel safe. On the other side of town, a man lies dead in his own bed.

Each new piece of evidence the team finds opens up more diverse issues and revelations about a woman who appears to be using multiple identities.

Is this mystery woman a female serial killer?

The female serial killer outwits her captors and seeks revenge on the team who arrested her.