Martin, Crystal and Troy Buchannan go undercover when a chemistry teacher and his family are kidnapped. The case takes on urgency when it's feared the kidnappers will use the teacher to manufacture a deadly gas.

Martin poses as an international arms dealer to rescue kidnapped chemist Richard Hubbard and track the sale of VX gas. Before long, he connects with a beautiful arms trader and slips into a shadowy romance with her.

Fallout from a shoot-out finds Martin taking Kyle Dobson into custody. Before long, Dobson's mysterious employers enlist hit men to retrieve a wounded Dobson, prompting Martin to plan a desperate escape with Dobson back to Los Angeles.

Martin finds out that Verax could be plotting an assassination. He is also kidnapped and makes a stunning discovery about his own identity.