The fire breaks out before dawn; after the smoke clears, a mother of two young children is found dead; it's the tragic end to a life that held so much promise, but for investigators, it is just the beginning.

A family mourns the loss of a young mother in a house fire; authorities rule it an accident; years later, there is another accident and second loved one gone; investigating if this just a string of bad luck or the work of a calculating killer.