Plumbum, or The Dangerous Game (Russian: Плюмбум, или опасная игра, "Plyumbum, ili Opasnaya igra") is a 1987 Soviet coming-of-age drama film directed by Vadim Abdrashitov.

At home, he seems like a typical son, singing songs by Bulat Okudzhava with his parents, while his classmate Sonya, who is in love with him, secretly knows he leads a double life.

He even manages to infiltrate a gang of vagrants, the "Invisibles," passing their whereabouts to his supervisor, Roman Ivanovich, known as "Grey."

In his pursuit of justice, Ruslan manipulates Maria, the girlfriend of one of the smugglers, into giving up information about her partner’s departure with stolen documents to Simferopol, gaining her trust only to betray her confidence to the authorities.

As Ruslan becomes more entrenched in his vigilante persona, he assists in dismantling the smuggling gang while wrestling with the fallout of his actions, including Maria's heartbreak.