The I-75 Strangler is still out there, and Libby Carter has one last chance to find them… Libby knows her father is innocent, and now it looks like her best suspect, her half-brother Brian, may be innocent as well. Though it breaks her heart, Libby helps Brian self-surrender to the police in order to keep him safe while she searches for the real killer. Libby is running out of time to put the pieces of the puzzle together… With the help of Detective Sebastian Webster, her father Randy, and her partner Harper, Libby finally uncovers the identity of the real I-75 Strangler, but the serial killer won’t come out of hiding willingly. Now Libby must figure out a way to lure them out of the shadows. If her plan doesn’t work, her brother may wind up lost in the prison system forever… The killer is smarter than Libby thought, and now she must play a dangerous game of cat and mouse to bring them to justice. When the I-75 Strangler gives her a final ultimatum, Libby has to decide between her brother’s freedom and bringing down the killer who has caused her family so much pain. No matter which choice she makes, someone will die. As her brother’s keeper, Libby has to figure out a way to save him and those she loves before it’s too late.