A forensic psychologist and expert in sleep-related homicides is the last hope for solving a case where a woman with a rare psychosomatic disorder stabbed two people to death while she slept.

Volunteering with a support group for children affected by domestic violence, forensic psychologist Claire Britten, aided by partner Nick Markwood, investigates a suspicious death at a wildlife sanctuary, only to be confronted by an attack that is too close to home.

"A much loved woman's dead body is found in her apartment, victim of horrendous overkill even as her dining room table is perfectly set for a romantic dinner. Turns out her devoted boyfriend has an alibi and, with few clues leading to a suspect, LAPD's Lieutenant Milo Sturgis calls in psychologist Alex Delaware for help. Then another woman's shot execution style; three bullets in the back of her head leave her husband with a profitable business. He's...

"Forensic psychologist Claire Markwood has experienced her share of disaster. But nothing could prepare her for her sister, Darcy, going missing. Claire rushes to the butterfly sanctuary where Darcy has been working, prepared to do what she does best--work the clues. But her sister, along with her car and some of the sanctuary's rarest species of butterflies, has seemingly vanished without a trace. Amid a flurry of mysterious leads and dead ends,...