Young veterinarian Rachel Goddard's world begins to crumble when a client rushes into the animal hospital with a basset hound struck by a car during a thunderstorm. The dog owner's terrified
tot, drenched with rain, loses sight of her mother in the flurry of activity and screams, ��ommy! I want Mommy!��Instantly Rachel is hurled back in time to a day in her own childhood when her
baby sister Michelle uttered the same cry while thunder crashed and rain poured down on them. The unearthed memory feels like a fragment from a nightmare, and Rachel doesn't understand its
meaning or the anguish it stirs up in her.