James Bradstone, a doctor on death row for 15 years convicted of killing his family is granted a stay of execution in the 11th hour when the eye witness's testimony is questioned. The only survivor, his son, was unconscious and barely alive and couldn't positively ID the killer. The team goes back through the evidence of the case and discover that the wife was having an affair with a man, Donald Newhouse, James was illegally selling prescription drugs to. They find he was there the night of the murder and becomes another suspect for them but he insists he didn't kill the wife or James' family. Through a series of back and forths and a closer look at the son's testimony, Horatio hits on a key detail that may make the eye witness's testimony not so impossible to believe.