In Los Angeles a deadly plague called the 'Pandora' virus is stolen from a high-security installation, and the F.B.I. calls in Agent Alec 'Mac' Mckay to follow up the leads. A trained virologist, he discovers the culprit is one of the world's top researchers. He discovers the man has a safety box in a bank vault and a trap is laid to capture both the doctor and reclaim the virus. Meanwhile, Julie Hayes discovers her do-well brother Scotty has become involved in the plan to rob a bank... The very bank that the F.B.I. is now watching in their bid to reclaim the Pandora virus.