To solve the most heinous murder in Texas history, Colby investigator Lyle McCaleb has an unusual mission: find and protect the killer's long-lost daughter. The complication: she's tough, gorgeous rancher Sadie Gilmore—Lyle's first and only love. And now the mysterious past she barely remembers is threatening her very existence. Lyle regrets leaving Sadie broken-hearted seven years ago. And as he investigates and gets deeper into danger, he finds it almost impossible to maintain his professionalism around her. But another dilemma threatens their newly rekindled relationship. Can Lyle regain Sadie's trust while concealing the secret that may devastate her?

With one of Texas' most heinous serial killers still on the loose, it's Colby agent Joel Hayden's sworn duty to protect single mom Laney Seagers. Getting a job at Laney's High Noon bar is easy for Joel…but gaining the trust of the fiercely independent beauty is considerably harder. Amid escalating danger, Joel struggles to safeguard the shattering family secret that could destroy all Laney has ever known. As he witnesses her world starting to unravel, how can he protect her without revealing what he knows? A lifelong bachelor, Joel learns a new lesson on the protecting Laney from violence may be easier than protecting her heart.

Colby agent Russell St. James knew the exact moment Olivia Westfield discovered she was the daughter of the infamous "Princess Killer." Ever since, being her bodyguard had become twice as hard. Each day, he shadowed her; each night, he held her through her tormenting nightmares. But was her father guilty? Her mother his accomplice? The answers lay deep in Olivia's memories, and the closer she got to the scene of the crime, the more she remembered. Russ had a job to safeguard Olivia and give her the future she deserved. Even if that future didn't include him.