During the 1950s, Helsinki was the focal point of the Cold War, as global powers and their intelligence agencies coalesced in the small neutral country that stood between the East and the West. Shadow Lines is an international spy thriller that follows a secret intelligence team whose mission is to defend the independence of Finland no matter the cost.

After a plot to kill the president of the USA an agent with lost memories tries to recover his life and memories. Others use him to cover up some dirty business involving high ranking officials from the CIA and the White House.