In tomorrow's world prowls a creative - and ruthlessly efficient - assassin who won't stop until Kirsten is killed. A troubled woman approaches Kirsten with a warning and a key and is later found dead. Was the woman just another victim of the Suicide Contagion or is there something more sinister at play? The key leads Kirsten to the Doomsday Vault and a hit list of seven people - and her barcode is on it--Back cover.