On a cold January morning, the killer executed Assistant District Attorney Mark Hasse in broad daylight. Eight shots fired a block from the Kaufman County Courthouse. Two months later, a massacre. The day before Easter, the couple slept. Bunnies, eggs, a flower centerpiece gracing the table. Death rang their doorbell and filled the air with the rat-a-tat-tat of an assault weapon discharging round after round into their bodies. Eric Williams and his wife, Kim, celebrated the murders with grilled steaks. Williams planned to exact revenge on all those who had wronged him.

Over a three-decade span, more than 20 women - many teenagers - died mysteriously in the small towns bordering Interstate 45, a 50-mile stretch of highway running from Houston to Galveston. The victims were strangled, shot, or savagely beaten.

Profiler Sarah Armstrong knows what it's like to be in a sticky situation. As a single mother and one of the few female Rangers in Texas history, she has had to work twice as hard to rank among the best cops in the Lone Star State. But when mega-wealthy businessman Edward Lucas III is found murdered along with his mistress, their bodies posed in grotesque ways, Sara quickly senses that this will be the deadliest case of her career. While others focus the investigation on Lucas's estranged wife, Sarah disagrees.

June 26, 2010. A Pennsylvania state trooper witnesses a car speeding and crashing into trees. Stopping to help, he finds that the driver, Michael Ballard, is alive - and drenched in blood. When asked what happened, the man answers, "I just killed everybody." Not far from the accident, police make a gruesome discovery. In the home of Michael's ex-girlfriend, Denise Mehri, they find four bodies that had been stabbed repeatedly with a knife.

After a series of tragedies turned her world upside down, FBI Agent Spenser Song felt like a woman adrift in a sea of chaos. Her brush with death and the tragic murder of her husband left her questioning everything in her life. And when it became clear that Bureau politics will trump justice, Spenser realized she needed a fresh start.