When Oscar discovers that the construction of a top secret laser is being duplicated, he suspects that Harry Green, the expert overseeing the project, is a traitor. However, Steve disagrees and believes that Green's thoughts are being monitored through ESP. He obtains the help of Audrey Moss, also gifted with ESP, to track down the spy.

O.S.I. needs to get a stolen top-secret codebook back from elusive criminal and club owner Mark Wharton.