Rose, Carrie and Oscar break into MI9 HQ and steal a top-secret file with the details of every operative in the field. They are caught on CCTV and Stark goes after them. Only it wasn't Rose, Carrie and Oscar, but robots which were modelled on the three spies. They look identical. Frank sends the spies into hiding, while he is captured by Stark and taken to an MI9 HQ torture chamber. He will never reveal where they are, no matter what Stark throws at him. Rose, Carrie and Oscar have an impossible mission. They must stay on the run, prove their own innocence and break Frank out of his torture chamber. Thankfully, Frank has left them some cryptic clues to help them. The spies discover Operation Looking Glass, a top-secret operation developed by Andrea Ivanovic, a brilliant, but totally mad, Russian scientist. To make things worse, the file with details of MI9 operatives has been put on an auction site and the price is over 40 billion pounds and rising. The spies must stop the identities of their fellow spies being sold to the highest bidder and uncover who is behind Operation Looking Glass and the only way they are going to break Frank out of MI9 is by tunnelling underground, using an old favourite, the Mole Machine. With the clock ticking, the spies discover the shocking truth about who created their doppelgangers!