Directed by Edvin Laine and Viktor Tregubovich, Trust (1976) is a Finnish-Soviet historical drama film that follows the relations between Finland and the Soviet Union. In December 1917, the Finnish delegation, composed of Chairman of the Senate Finance Department P.E. Svinhufvud (Vilho Siivola), Senator Carl Enckell (Yrjö Tähtelä) and State Secretary Gustaf Idman (Yrjö Paulo) arrive in St. Petersburg to meet V.I. Lenin (Kirill Lavrov) to gain recognition for the country's independence.
A TV reporter is murdered when he is eavesdropping on a secret Finnish-Soviet conference. The National Broadcasting Corporation enlists the help of police lieutenant Palmu, who comes out of retirement for this case. However, some have their doubts about the loyalities of Palmu, seeing that he was spotted in a diplomatic soiree in Moscow just a few weeks before the murder.