Calculating the odds on their fate isn’t exactly rocket science…Nuclear physicist Mark Renfro will do anything to keep his daughter safe, including building a "suitcase nuke" for the radical group that killed his wife. Imprisoned alone in a make-shift lab, Mark has all but given up hope of seeing his daughter again. Until his captors provide an assistant-the beautiful stepdaughter of the terrorist leader.Angry and defiant, Erin Daniels has no intention of assisting anyone – including a gorgeous scientist. That is, until a time bomb is strapped around her neck. They have one week to finish…or Erin dies. Mark knows he’s Erin’s only hope for survival. And she’s his only hope for a future.