When Piper and her friend Tash disappeared, there was a huge police search, but they were never found. Now Tash, reaching breaking point at the abuse their captor has inflicted on them, has escaped, promising to come back for Piper. Clinical psychologist Joe O'Loughlin and his stalwart companion, ex-cop Vincent Ruiz, force the police to re-open the case after Joe is called in to assess the possible killer of a couple in their own home and finds a connection to the missing girls.

When Sienna Hegarty turns up at his family home one night, covered in blood and frozen in shock, psychologist Joe O'Loughlin finds himself drawn deep into her world, trying to unearth the dark secrets her mind has buried. The police find a major piece of the puzzle at Sienna’s house: her father, a retired cop, is face-down in a pool of his own blood, his throat slashed and his skull caved in. The blood covering Sienna was his.

Marnie Logan often feels like she's being watched. Nothing she can quite put her finger on - a whisper of breath on the back of her neck, or a shadow in the corner of her eye - and now her life is frozen. Her husband Daniel has been missing for more than a year. Depressed and increasingly desperate, she seeks the help of clinical psychologist Joe O'Loughlin. Joe is concerned by Marnie's reluctance to talk about the past, but then she discovers a book packed with pictures, interviews with friends, former teachers, old flames and workmates Daniel was preparing for her birthday.

Sami Macbeth is not a master criminal. He's not even a minor one. He's not a jewel thief. He's not a safe-cracker. He's not an expert in explosives. Sami plays guitar and wants to be a rock god but keeps getting side-tracked by unforeseen circumstances. Fifty-four hours ago Sami was released from prison. Thirty-six hours ago he slept with the woman of his dreams at the Savoy. An hour ago his train blew up. Now he's carrying a rucksack through London's West End and has turned himself into the most-wanted terrorist in the country.

Everyone has an idea of what their perfect life is. For Agatha, it's Meghan Shaughnessy's. These two women from vastly different backgrounds have one thing in common - a dangerous secret that could destroy everything they hold dear. Both will risk everything to hide the truth, but their worlds are about to collide in a shocking act that cannot be undone.