In March 2004, when Estonia joins NATO and becomes a top target for the Russian intelligence, prompted by umbrage, an official at the Estonian Ministry of Defence turns into a Russian spy. Hereon begins a cat-and-mouse game between him and a determined young Estonian counterintelligence officer as they navigate the twists and turns of the action framed by challenges in both their personal lives. The stylish and thrilling six-part spy drama series is inspired by espionage scandals from Estonia’s recent history.