As both Hacker and the CyberSquad go off in search of a giant cyber-slug, the kids realize that Hacker has a listening device that taps into their communications system. The kids decide to devise a secret code so they can send messages back and forth without Hacker understanding what they are saying. The code involves numbers, which are associated with pictures, and it's used to send messages explaining where the CyberSquad should travel to find the cyber-slug.