A highly classified lunar sample — a giant diamond — disappears immediately after delivery by a World Securities courier, and Lockwood is sent to retrieve it.

The brilliant but mentally unstable inventor of a device capable of remotely overloading and destroying any active electrical or electronic circuit is attempting to destroy Probe Control.

When one of World Securities' probes goes missing, Nick Bianco is assigned to find out what happened to him. The agent was working a currency counterfeit case and Bianco must solve that case as well.

A State Department consultant is missing and Probe Division is hired to find out what happened to him.