Luch smerti (1925)

In an unknown capitalist country, workers stage a revolt but are heavily repressed by the boss and fascists. One of them, Tomas Lann, manages to escape to USSR where he meets engineer Podobed who invented the "death ray", a powerful laser beam. However capitalist spies manage to steal the device and use it to repress strikes in their country. Eventually, Tomas manages to recuperate the device to fight back. (Note: the beginning and ending of the movie have been lost.)