There's a traitor at the BARK intelligence agency! But who could it be? Agent Harrier, now in a supercool spy car assigned to him by gadget guru Dr. Doppel, must discover the identity of this double agent and stop them before it's too late. But all is not as it seems ... Harrier calls Top Dog for a briefing, only to be told he has already been briefed. He interviews his Prime Suspects, only for them to already know the questions he's going to ask. And something even stranger is happening with the book itself ... whole scenes are replaying in front of the readers' eyes. Why are we seeing double, and can Agent Harrier solve this strange mystery before it's too late?