Diamonds for Mariya (1976)

Mary and Ivan are working on a diamond factory. The wedding day is already set. But Ivan has a secret: during his stay in prison, the leader of the gang gave him a bag of diamonds for safekeeping. Return the "stones" factory — means to Express itself as a partner in crime, throw — sorry, but left for Mary — to destroy love. Soon the "friend" made itself felt and demanded to repay the debt…