Secret agent Zac Darke is back for his third mission
- & the stakes have never been higher. An unknown bomber is conducting a terror campaign in London. After an explosion on the tube leaves someone dead Zac & his team are brought in to try & work out how this terror cell operates
- but clues are scarce & they have no idea where or when the bomber will strike next. A teenage boy currently detained in a young offender's institute claims he has the answer
- but before Zac can question him the boy is shot & falls into a coma. Will Zac be able to break the cipher before the bomber strikes again?