While Tom and his dad are hiking in a state park, Mr. Swift is kidnapped. Tom is eager to use the resources of Swift Enterprises to go after him, but the FBI agent in charge of the investigation warns him to stay out of it, and the company''s head of security is arrested. Of course, none of that can stop Tom -- it just makes things a bit harder.
Using an invisibility suit he invented, his advanced computer (Q.U.I.P.), and his father''s new drilling machine, Tom hunts for clues. He''s joined by his sister, Sandy, and his arch-rival, Andy Foger, whose father is accused of the kidnapping. But the clues seem to be leading in an unexpected direction -- to the FBI itself.