Run For Your Life by C. M. Sutter

Detective Mitch Cannon is excited about his date with a new friend, Liza, but a blocked call starts five days of pure hell. Mitch’s sister, Marie, is missing. The next day, Mitch’s partner, Devon, and Liza disappear too. The only clue is from a caller saying, “Ticktock, ticktock.”
Mitch begins a white-knuckled search for them before they disappear forever.