Dr. Jason Cole (Steven Pasquale, Rescue Me) is a highly respected neurosurgeon who has it all - a lucrative career, confident charm and the gift of compassion. But he also has a deep, dark secret. Every night at the same hour, something inside Jason changes, leaving him almost unrecognizable - seductive, devious, borderline sociopathic. This new man is his dangerous alternate personality who goes by the name of 'Ian Price'. For years, as he's battled Dissociative Identity Disorder (DID), Jason has been able to keep Ian in check with a powerful experimental sedative. But now his - their - body has developed a resistance to the serum, setting Ian free once again. And to make matters worse, after being suppressed for so long, Ian's hell-bent on taking revenge on his oppressor. Hell hath no fury like an alter scorned.