Unscrupulous - Circle City Mystery Series, #5

Christmas is only a week away, but not all is merry and bright for Sergeant Brent Freeman and his partner, newly promoted Detective Anne Samuels. They find themselves facing more than a homicide when they discover the victim's five-year-old daughter, Maricella, is missing. When suspicion moves to human trafficking and gang involvement, the FBI sends in two of their best to assist in the investigation.
In the meantime, two people who insist her mother didn't want her anymore have transported a terrified little Maricella out of state. Fortunately, she finds solace in two older children. These two soon realize their captors are prepping Maricella for organ harvesting. Their main goal becomes to protect her at any cost, even if it means running away in the snow and bitter cold temperatures of December without any knowledge of the area where they're being held.
Can Maricella's new found protectors get her out of the house and to safety before the doctor decides she's a transplant match? Will Brent discover where these unscrupulous persons are hiding the children before it's too late?