Los Alamos, New Mexico -- When an old man who helped develop the atomic bomb during WW II tells two women about an espionage network hidden for fifty years, they discover his secret is deadly. On their way home from the nursing home, in a blizzard, their car is forced off a mountain road. Newspaper reporter Patrice Kelsey survives, though injured, and is left to figure out who murdered her friend. Before she can discover who, she must ask why? Is the dark legacy of a spy code-name "Perseus" worth killing for? And will she live to publish the truth?