Dr. Amy Sinclair is invited to give a medical conference out of town. Her husband and son accompany her as the Sinclairs decide to turn this opportunity into a little R&R over a long weekend. But Amy's worse nightmare confronts soon after their arrival. Her son collapses and is taken to the local hospital. The Sinclairs learn their son was poisoned with a toxin with no known antidote and has less than 12 hours to live. Who? How? And most importantly, why would someone do this to their teenage son? The Sinclairs race to save their son's life and to get answers to their questions about the monster who forever changed their lives.