When psychologist Kate Kovic is asked to evaluate the sanity of a young girl on death row who is exhibiting signs of multiple personality disorder, she has only seven days before the scheduled execution to determine whether the girl is faking her condition to avoid the death penalty or if her personalities are in fact the missing clue to the unsolved murders of The Toyman Killer.

After a 40-year armistice in a war between the Twelve Colonies and the Cylons, the Cylons launch a surprise nuclear attack intended to exterminate the human race. Virtually all of the population of the Twelve Colonies are wiped out.