1960s USSR. The peak of KGB paranoia.
Neighbors are ratting out neighbors. Employees report their coworkers to the KGB for innocuous jokes. Nighttime knocks on the door are commonplace. Regular citizens are labeled enemies of the people and taken away.
A group of university students are on a government-sponsored trip to a conference, 6 of them sharing a hotel room, as was commonplace on such trips. None of them know each other.
At night, they talk merrily amongst themselves, laughing and enjo…