Detective Kara Quinn, on leave from the LAPD, is on an early morning jog in her hometown of Liberty Lake when she comes upon the body of a young nurse. The manner of death shows a pattern of highly controlled rage. Meanwhile in DC, FBI Special Agent Mathias Costa is staffing his newly minted Mobile Response Team. Word reaches Matt that the Liberty Lake murder fits the profile of the compulsive Triple Killer. It will be the first case for the MRT. This time, they have a chance to stop this zealous, if elusive, killer before he strikes again.

Lucas Vega is obsessed with the death of Candace Swain, who left a sorority party one night and never came back. Her body was found after two weeks, but the case has grown cold. Three years later while interning at the medical examiner's, Lucas discovers new information, but the police are not interested.

After five years in hiding from their murderous father, the day Kristen and Ryan McIntyre have been dreading has arrived: Boyd McIntyre, head of a Los Angeles crime family, has at last tracked his kids to a small Montana town and is minutes away from kidnapping them. They barely escape in a small plane, but gunfire hits the fuel line. The pilot, a man who has been raising them as his own, manages to crash land in the middle of the Montana wilderness. The siblings hike deep into the woods, searching desperately for safety—unaware of the severity of the approaching storm.

From Atlanta's wealthiest suburbs to its stark inner-city housing projects, a killer has crossed the boundaries of wealth and race. And the people who are chasing him must cross those boundaries, too. Among them is Michael Ormewood, a veteran detective whose marriage is hanging by a thread and whose arrogance and explosive temper are threatening his career. And Angie Polaski, a beautiful vice cop who was once Michael's lover before she became his enemy.

In the unbearable heat of another sultry Washington, D.C., summer, a serial killer is on the loose. Dr. Tess Court, one of the capital’s most successful psychiatrists, wants nothing to do with the case—until the police convince her to lend a hand to the lead investigator, legendary ladies’ man Detective Ben Paris. Scarred by his family’s history, Ben has even less use for shrinks than Tess has for him—but the forces of animal magnetism and a shared desire to catch the demented criminal known as “The Priest” inexorably erode the walls they’ve built.