Wajda's most underrated film ever. Made in sombre manner displays the fragment of the history of Poland when Soviets and their local adherents overtook the reign in country. 　　Betrayal, infiltration, invigilation, deception wins. Heroes are now villains and villains are heroes. Best role of Cezary Pazura as a delirious scoundrel from UB /polish equivalent of NKWD/.