In the 1950s, the Cold War’s hottest spot wasn’t Washington or Moscow. In the wake of World War II, the tiny Nordic nation of Finland found itself on the front lines of the world’s latest conflict. Shadow Lines is a dazzling international espionage thriller that follows a secret intelligence team whose mission is to defend the independence of Finland. No matter the cost.
The Fist, a secret Finnish task force, has a covert operation in the USA Embassy in Helsinki, Finland
Helena is determined to prove to Yrjö that she belongs to the Fist. She does what she is told, but has to pay a high price to succeed.
Lisa Salmén, a new CIA agent, arrives in Finland while the Fist sets out to confirm the information they stole from the Americans.
The Fist learns that the Soviet leader Khrushchev is about to return the Porkkala to Finland, to ensure that the Prime Minister Kekkonen becomes the next president of Finland.
Helena, Tabe, and Olavi follow the Finnish president and prime minister to Moscow to ensure that Khrushchev doesn’t change his mind about Porkkala.
Tabe Slioor throws a big party to celebrate the prime minister Kekkonen and his successful trip to Moscow. The real purpose of the party is to start a new mission.
The Fist sets out to stop the money shipment from CIA to Fagerholm’s campaign. Helena confronts Yrjö about her past.
Badly beaten Julius is trapped at the headquarters. Aune pressures Yrjö to forgive Julius, and he comes with a solution.
Olavi’s mission has succeeded, and Kekkonen has convinced Hrushchev to return Porkkala just before the presidential election.
As the new president of Finland is inaugurated, the Fist buries one of their own. Helena is still looking for answers about her past, and a new enemy arrives.
Helena learns shocking things about her mother and goes undercover to find out who is behind the strike. The Fist searches for their new enemy.
The strike ends and Kekkonen rewards Yrjö by giving him a break. Helena and Olavi share a fun night, while Aune visits an old friend to find their enemy.
The Fist learns about a top-secret meeting between heads of states, to which they aren’t invited. But that doesn’t stop them from going anyway.
The Fist is falling apart as no one knows who to trust. Helena takes a major risk and Olavi pays a high price for his loyalty.
As Helena struggles with her past and Yrjö for his life, Olavi makes a difficult choice. Aune enjoys her newfound power, while Tabe decides to turn a new leaf.
Helena meets her father, and Tabe visits her past, while Olavi finds himself on the way to hell. The Fist has to save Finland from war, but is it too late?