23-year-old Martin Rauch is sent to West Germany to act as a spy for East Germany's Secret Service.
Martin is ordered by Tischbier to break into Hendrik Mayer's hotel room to steal a top secret security report.
Moritz gets his first Romeo assignment: to seduce the head security analyst's secretary, Linda.
A bug is discovered in Linda's desk in Brussels just as she arrives to visit Moritz in West Germany; Moritz scrambles to turn her loyalties.
Tischbier tells Martin that his mother will have her transplant; Martin must deliver a package.
When Moritz returns to his undercover life in West Germany, he is drawn into Alex Edel's fatal plans.
When Martin receives an order from East Germany, he realizes that his concern about their paranoia has been validated.
At East German HQ, fear of a pre-emptive nuclear strike against the west has become a possibility.