Catherine Preston impulsively drives into Philadelphia to meet her friend at the famous Crystal Tea Room. Having forgotten that Olga Cento passed away years earlier, the confused heiress wanders around the city. She returns home hours later, unable to explain how a tampered vial of insulin wound up in her purse.
Determined to recreate those lost hours, award-winning investigative reporter Laura Hunter suspects that her grandmother has foiled a potentially perfect murder. Unable to identify the actual victim, she suspects that a plan to find and silence the grandmother she has known for less that six months is already underway.
Judith Milner is mourning the sudden death of her husband when she learns that the nominating committee is eyeing her to replace him as their candidate for Governor of Pennsylvania. Given her lifelong dream to become the first woman governor, Judith prepares to squash anyone who gets in her way.
Shaken by Catherine's increasingly strange behavior as well as the likelihood that Judith's husband may be her unidentified victim, Laura ignores the possibility that her old high school rival orchestrated his untimely death.
During an ill-advised trip to Judith's secluded mountain home, Laura and Catherine become trapped by a deadly snow squall. Seeing the perfect opportunity to eliminate the last remaining threat to her political future, Judith must choose between saving Laura or betraying the man who controls her destiny.
