Final answer:
In 'Logan's Run', citizens must undergo 'Carrousel' at the age of 30, which leads to their death. The movie depicts a dystopian future where the protagonist Logan eventually seeks the truth outside his domed city.
Step-by-step explanation:
In the movie Logan's Run, life must end at the age of 30. This science fiction film is set in a dystopian future where a domed city's society imposes a rule that dictates all of its citizens must undergo a process known as 'Carrousel' at the age of 30, which ostensibly promises rebirth, but in reality leads to their death. The story follows the character Logan, a 'Sandman' charged with enforcing this rule, who ultimately embarks on a journey to escape the city's confines and discovers the truth about his society.